| 11 Nov 2025 | Quarterly Results | - | 
                                    
                                        
                                            | 12 Aug 2025 | Quarterly Results | - | 
                                    
                                        
                                            | 22 May 2025 | Audited Results & Final Dividend | - | 
                                    
                                        
                                            | 07 Feb 2025 | Quarterly Results | - | 
                                    
                                        
                                            | 07 Nov 2024 | Quarterly Results | - | 
                                    
                                        
                                            | 08 Aug 2024 | Quarterly Results | - | 
                                    
                                        
                                            | 08 May 2024 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 14 Feb 2024 | Quarterly Results | - | 
                                    
                                        
                                            | 06 Nov 2023 | Quarterly Results | - | 
                                    
                                        
                                            | 04 Aug 2023 | Quarterly Results | - | 
                                    
                                        
                                            | 11 May 2023 | Audited Results & Final Dividend | - | 
                                    
                                        
                                            | 13 Feb 2023 | Quarterly Results | - | 
                                    
                                        
                                            | 10 Nov 2022 | Quarterly Results | - | 
                                    
                                        
                                            | 04 Aug 2022 | Quarterly Results | - | 
                                    
                                        
                                            | 12 May 2022 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 10 Feb 2022 | Quarterly Results | - | 
                                    
                                        
                                            | 03 Nov 2021 | Quarterly Results | - | 
                                    
                                        
                                            | 09 Aug 2021 | Quarterly Results | - | 
                                    
                                        
                                            | 03 Jun 2021 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 10 Feb 2021 | Quarterly Results | - | 
                                    
                                        
                                            | 11 Nov 2020 | Quarterly Results | - | 
                                    
                                        
                                            | 06 Aug 2020 | Quarterly Results | - | 
                                    
                                        
                                            | 08 Jun 2020 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 13 Feb 2020 | Quarterly Results | - | 
                                    
                                        
                                            | 08 Nov 2019 | Quarterly Results | - | 
                                    
                                        
                                            | 02 Aug 2019 | Quarterly Results | - | 
                                    
                                        
                                            | 09 May 2019 | Audited Results & Final Dividend | - | 
                                    
                                        
                                            | 08 Feb 2019 | Quarterly Results | - | 
                                    
                                        
                                            | 03 Nov 2018 | Quarterly Results | - | 
                                    
                                        
                                            | 30 Jul 2018 | Quarterly Results | - | 
                                    
                                        
                                            | 21 May 2018 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 19 Mar 2018 | Others | - | 
                                    
                                        
                                            | 08 Feb 2018 | Quarterly Results | - | 
                                    
                                        
                                            | 13 Nov 2017 | Quarterly Results | - | 
                                    
                                        
                                            | 11 Aug 2017 | Quarterly Results | - | 
                                    
                                        
                                            | 25 May 2017 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 06 Feb 2017 | Quarterly Results | - | 
                                    
                                        
                                            | 30 Nov 2016 | Quarterly Results | Revised from 01/12/2016 | 
                                    
                                        
                                            | 09 Sep 2016 | Quarterly Results | - | 
                                    
                                        
                                            | 19 May 2016 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 21 Apr 2016 | Appointment of Director | - | 
                                    
                                        
                                            | 04 Feb 2016 | Quarterly Results | Approved allotment of 140304 Equity Shares under Employees Stock Option Scheme - 2010 (ESOP - 2010) consequent to which the Paid-up Share Capital of the Company has increased from Rs. 563,19,97,600. | 
                                    
                                        
                                            | 06 Nov 2015 | Quarterly Results | The Board approved allotment of 99079 Equity Shares under Employees Stock  Option Scheme - 2010 (ESOP - 2010). | 
                                    
                                        
                                            | 07 Aug 2015 | Quarterly Results | - | 
                                    
                                        
                                            | 22 May 2015 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 13 Feb 2015 | Quarterly Results | - | 
                                    
                                        
                                            | 07 Nov 2014 | Quarterly Results | - | 
                                    
                                        
                                            | 07 Aug 2014 | Quarterly Results | - | 
                                    
                                        
                                            | 22 May 2014 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 06 Feb 2014 | Quarterly Results | - | 
                                    
                                        
                                            | 13 Nov 2013 | Quarterly Results | (Revised) | 
                                    
                                        
                                            | 30 May 2013 | Audited Results & Dividend | (Revised) | 
                                    
                                        
                                            | 08 Feb 2013 | ESOP | - | 
                                    
                                        
                                            | 07 Nov 2012 | Quarterly Results | - | 
                                    
                                        
                                            | 09 Aug 2012 | Quarterly Results | - | 
                                    
                                        
                                            | 24 May 2012 | Audited Results, Dividend & ESOP | Employees Stock Option Plan. | 
                                    
                                        
                                            | 09 Feb 2012 | Quarterly Results & Others | The Board has approved increase in borrowing limits U/S 293 (1)(d), creation of charge/security in favor of lenders u/s 293 (1) (a) and increase in investment limits U/S 372A of the Co's Act, 1956. | 
                                    
                                        
                                            | 19 Jan 2012 | Employees Stock Option Plan | For allotment of 8,044 Equity Shares under ESOS - 2005 (ESOP - 2005) consequent to which the Paid-up Share Capital of the Company has increased from Rs 5,626,810,830 to Rs 562,68,91,270. | 
                                    
                                        
                                            | 14 Nov 2011 | Quarterly Results | - | 
                                    
                                        
                                            | 09 Aug 2011 | Quarterly Results | - | 
                                    
                                        
                                            | 26 May 2011 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 10 Feb 2011 | Quarterly Results | - | 
                                    
                                        
                                            | 27 Oct 2010 | Quarterly Results | - | 
                                    
                                        
                                            | 29 Jul 2010 | Quarterly Results & ESOP | For allotment of 39,768 Equity Shares under Employees Stock Option Scheme, consequent to which the paid up Share Capital of the Company has increased from Rs. 562,48,41,610 to 562,52,39,290. | 
                                    
                                        
                                            | 27 May 2010 | Audited Results, Dividend & Others | The Board approved allotment of 35577 Equity Shares under ESOS, consequent to which the paid up Share Capital of the Co. has  increased from Rs 562,44,85,840 to Rs. 562,48,41,610. | 
                                    
                                        
                                            | 12 Mar 2010 | Appointment / Resignation of Director's | The Board has appointed Shri J. K. Jain and Shri R. Vaidyanathan as Independent Directors of the Company w.e.f. Mar 12, 2010 & Accepted the resignation of Shri P. K. Pujari, IAS w.e.f. Mar 02, 2010. | 
                                    
                                        
                                            | 25 Jan 2010 | Quarterly Results & ESOP | The Board has approved allotment of 1,21,584 Equity Shares under ESOP, Consequent to which the paid up Share Capital of the Company increased from Rs. 562,32,70,000 to 562,44,85,840. | 
                                    
                                        
                                            | 23 Dec 2009 | Resignation of Director | The Board has accepted the resignation of Shri. S Jagadeesan, IAS w.e.f. December 11, 2009. | 
                                    
                                        
                                            | 23 Oct 2009 | Quarterly Results & ESOP | The Board has approved allotment of 1,09,126 Equity Shares under ESOS, consequent to which the paid up Share Capital of the Company has increased from Rs 562,21,78,740 to 562,32,70,000. | 
                                    
                                        
                                            | 23 Jul 2009 | Quarterly Results & Others | To approve the allotment of 102,671 Equity Shares under ESOP consequent to which the paid up Share Capital of the Company has increased from Rs 562,11,52,030 to Rs 562,21,78,740. | 
                                    
                                        
                                            | 30 Jun 2009 | Audited Results & Dividend | (Board meeting postphoned from 26/06/2009 to 30/06/2009) | 
                                    
                                        
                                            | 02 Feb 2009 | Quarterly Results | (Postponed from 31/01/2009 to 02/02/2009) | 
                                    
                                        
                                            | 24 Oct 2008 | Quarterly Results & Others | To allot 45777 Equity Shares under Employees Stock Option Scheme consequent to which the paid up share capital of the Company has increased from Rs 562,03,24,020 to Rs 562,07,81,790. | 
                                    
                                        
                                            | 25 Jul 2008 | Quarterly Results | - | 
                                    
                                        
                                            | 27 Jun 2008 | Audited Results & Dividend | - | 
                                    
                                        
                                            | 28 Jan 2008 | Quarterly Results | - | 
                                    
                                        
                                            | 25 Oct 2007 | Quarterly Results | - | 
                                    
                                        
                                            | 26 Jul 2007 | Quarterly Results | - | 
                                    
                                        
                                            | 18 Jan 2007 | Employees Stock Option Plan | - | 
                                    
                                        
                                            | 26 Oct 2006 | Quarterly Results | - | 
                                    
                                        
                                            | 28 Jul 2006 | Quarterly Results | - | 
                                    
                                        
                                            | 21 Jun 2006 | Accounts & Dividend | - |