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	Unallocated Common Stock Held by ESOP
Balance at Dec. 31, 2012	$ 1,293,989		$ 1,665	$ 884,689	$ 1,891,022	$ (1,406,755)	$ (73,090)	$ (3,542)
Increase (Decrease) in Stockholders' Equity
Net income	13,852				13,852
Other comprehensive income, net of tax	791						791
Issuance of Preferred Stock, Series C (135,000 shares)	129,796	129,796
Dividends on common stock ($0.04 per share)	(3,918)				(3,918)
Restricted stock grants (531,110 shares)				(5,152)	(5,823)	10,975
Forfeitures of restricted stock (38,902 shares)				446	358	(804)
Stock-based compensation	1,727			1,697	30
Net tax benefit shortfall from stock-based compensation	(1,345)			(1,345)
Allocation of ESOP stock	2,600			1,631				969
Balance at Mar. 31, 2013	$ 1,437,492	$ 129,796	$ 1,665	$ 881,966	$ 1,895,521	$ (1,396,584)	$ (72,299)	$ (2,573)