Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Unallocated Common Stock Held by ESOP
Beginning Balance at Dec. 31, 2010	$ 1,241,780	$ 1,665	$ 864,744	$ 1,848,095	$ (1,417,956)	$ (42,161)	$ (12,607)
Comprehensive income:
Net income	44,229			44,229
Other comprehensive income, net of tax:
Net unrealized gain on securities	3,876					3,876
Reclassification of prior service cost	30					30
Reclassification of net actuarial loss	2,782					2,782
Reclassification of loss on cash flow hedge	95					95
Comprehensive income	51,012
Dividends on common stock ($0.26 per share)	(24,707)			(24,707)
Restricted stock grants (615,650 shares)			(8,796)	(3,926)	12,722
Forfeitures of restricted stock (4,806 shares)			65	34	(99)
Stock-based compensation	4,541		4,539	2
Net tax benefit excess from stock-based compensation	67		67
Allocation of ESOP stock	5,838		4,329				1,509
Ending Balance at Jun. 30, 2011	$ 1,278,531	$ 1,665	$ 864,948	$ 1,863,727	$ (1,405,333)	$ (35,378)	$ (11,098)