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 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	53,849				53,849
Other comprehensive income, net of tax	8,049						8,049
Dividends on preferred stock ($32.50 per share)	(4,388)				(4,388)
Dividends on common stock ($0.08 per share)	(7,947)				(7,947)
Sales of treasury stock (301,834 shares)	4,064				(2,174)	6,238
Restricted stock grants (429,346 shares)				(5,422)	(3,450)	8,872
Forfeitures of restricted stock (18,326 shares)				220	159	(379)
Stock-based compensation	4,253			4,246	7
Balance at Jun. 30, 2014	$ 1,577,393	$ 129,796	$ 1,665	$ 893,341	$ 1,966,082	$ (1,383,290)	$ (30,201)