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Consolidated Statements of Shareholders' Equity (USD $) In Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Treasury Stock | Deferred Compensation Trust | Deferred Compensation Liability
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2008 | $ 1,373,789 | $ 206 | $ 722,265 | $ 3,630,887 | $ (2,979,569) | $ (74,978) | $ 74,978
Net income | 192,180 |  |  | 192,180 |  |  |
Deferred compensation activity |  |  |  |  |  | 34,179 | (34,179)
Equity-based compensation | 46,302 |  | 46,302 |  |  |  |
Tax benefit from stock options exercised and deferred compensation distributions | 66,448 |  | 66,448 |  |  |  |
Proceeds from stock options exercised | 78,543 |  | 78,543 |  |  |  |
Treasury stock issued upon option exercise |  |  | (83,027) |  | 83,027 |  |
Ending Balance at Dec. 31, 2009 | 1,757,262 | 206 | 830,531 | 3,823,067 | (2,896,542) | (40,799) | 40,799
Net income | 206,005 |  |  | 206,005 |  |  |
Deferred compensation activity |  |  |  |  |  | 13,217 | (13,217)
Purchase of common stock for treasury | (417,079) |  |  |  | (417,079) |  |
Equity-based compensation | 53,136 |  | 53,136 |  |  |  |
Tax benefit from stock options exercised and deferred compensation distributions | 63,558 |  | 63,558 |  |  |  |
Proceeds from stock options exercised | 77,492 |  | 77,492 |  |  |  |
Treasury stock issued upon option exercise |  |  | (73,483) |  | 73,483 |  |
Ending Balance at Dec. 31, 2010 | 1,740,374 | 206 | 951,234 | 4,029,072 | (3,240,138) | (27,582) | 27,582
Net income | 129,420 |  |  | 129,420 |  |  |
Deferred compensation activity |  |  |  |  |  | 2,001 | (2,001)
Purchase of common stock for treasury | (689,302) |  |  |  | (689,302) |  |
Equity-based compensation | 64,473 |  | 64,473 |  |  |  |
Tax benefit from stock options exercised and deferred compensation distributions | 22,835 |  | 22,835 |  |  |  |
Proceeds from stock options exercised | 106,999 |  | 106,999 |  |  |  |
Treasury stock issued upon option exercise |  |  | (72,762) |  | 72,762 |  |
Ending Balance at Dec. 31, 2011 | $ 1,374,799 | $ 206 | $ 1,072,779 | $ 4,158,492 | $ (3,856,678) | $ (25,581) | $ 25,581

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