UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss, net of tax [Member]	ESOP [Member]	Unearned Restricted Stock Award Common Stock [Member]	Treasury Stock [Member]	Common Stock Held by BMP [Member]
Balance at Dec. 31, 2010		$ 512	$ 225,585	$ 329,668	$ (6,352)	$ (3,470)	$ (2,684)	$ (206,546)	$ (7,979)
Stock options exercised		2	1,800
Forfeited restricted stock award shares returned to treasury stock			2				22	(24)
Tax benefit (expense) of stock plans			305
BMP award distribution									21
Amortization of excess fair value over cost - ESOP stock and stock options expense			804
Release from treasury stock for restricted stock award and BMP benefit shares			500				(1,953)	2,129	(676)
Net income	23,418			23,418
Cash dividends declared and paid				(9,417)
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of tax					32
Reduction in non credit component of OTTI charge, net of taxes	688				688
Change in unrealized gain or loss on available-for-sale securities during the period					44
Adjustments to other comprehensive income from defined benefit plans, net of tax					27
Amortization of earned portion of ESOP stock						116
Amortization of earned portion of restricted stock awards							700
Balance at Jun. 30, 2011		514	228,996	343,669	(5,561)	(3,354)	(3,915)	(204,441)	(8,634)
Balance at Dec. 31, 2011	361,034	516	231,521	358,079	(9,709)	(3,239)	(3,037)	(204,442)	(8,655)
Stock options exercised		1	812
Forfeited restricted stock award shares returned to treasury stock			(3)				32	(29)
Tax benefit (expense) of stock plans			189
Amortization of excess fair value over cost - ESOP stock and stock options expense			733
Release from treasury stock for restricted stock award and BMP benefit shares			217				(1,959)	1,887	(145)
Net income	21,778			21,778
Cash dividends declared and paid				(9,563)
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of tax					78
Reduction in non credit component of OTTI charge, net of taxes	154				154
Non-credit component of OTTI charge recognized during the period, net of tax					(3)
Change in unrealized gain or loss on available-for-sale securities during the period					(241)
Adjustments to other comprehensive income from defined benefit plans, net of tax					312
Amortization of earned portion of ESOP stock						116
Amortization of earned portion of restricted stock awards							899
Balance at Jun. 30, 2012	$ 376,299	$ 517	$ 233,469	$ 370,294	$ (9,409)	$ (3,123)	$ (4,065)	$ (202,584)	$ (8,800)