Consolidated Statement of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2010	$ 457,161	$ 997	$ 201,442	$ 618,813	$ (346,064)	$ (18,027)
Balance (in shares) at Dec. 31, 2010		99,701
Increase (Decrease) in Stockholders' Equity
Net income	135,437			135,437
Recognition of equity compensation	34,490		34,490
Issuance of nonvested shares and other			(28,047)		28,047
Dividends accrued, $0.60 per share	(51,606)			(51,606)
Exercise of stock options	4,822		941		3,881
Excess tax benefits from share-based payment arrangements	7,873		7,873
Repurchase of common stock	(57,100)				(57,100)
Unrealized depreciation on available for sale investment securities	(5,657)					(5,657)
Valuation allowance on investment securities' deferred tax asset	(4,129)					(4,129)
Pension and postretirement benefits	1,171					1,171
Reclassification adjustment for amounts included in net income	(1,428)					(1,428)
Balance at Sep. 30, 2011	$ 521,034	$ 997	$ 216,699	$ 702,644	$ (371,236)	$ (28,070)
Balance (in shares) at Sep. 30, 2011		99,701