Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at beginning of period at Dec. 31, 2013	$ 1,519,513	$ 129,796	$ 1,665	$ 894,297	$ 1,930,026	$ (1,398,021)	$ (38,250)
Increase (Decrease) in Stockholders' Equity
Net income	72,657				72,657
Other comprehensive income, net of tax	7,716						7,716
Dividends on preferred stock ($48.75 per share)	(6,582)				(6,582)
Dividends on common stock ($0.12 per share)	(11,929)				(11,929)
Sales of treasury stock (459,836 shares)	6,092				(3,410)	9,502
Restricted stock grants (429,346 shares)				(5,422)	(3,450)	8,872
Forfeitures of restricted stock (23,590 shares)				281	206	(487)
Stock-based compensation	6,488			6,477	11
Net tax benefit excess from stock-based compensation	51			51
Balance at end of period at Sep. 30, 2014	$ 1,594,006	$ 129,796	$ 1,665	$ 895,684	$ 1,977,529	$ (1,380,134)	$ (30,534)