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, 2009		$ 511	$ 214,654	$ 306,787	$ (5,082)	$ (3,701)	$ (2,505)	$ (207,884)	$ (8,007)
Stock options exercised			165
Forfeited restricted stock award shares returned to treasury stock			3				149	(152)
Tax benefit (expense) of stock plans			88
BMP award distribution			(28)						28
BMP reclassification			8,007	133
Amortization of excess fair value over cost - ESOP stock and stock options expense			866
Release from treasury stock for restricted stock award and BMP benefit shares			47				(1,824)	1,777	0
Net income	19,474			19,474
Cash dividends declared and paid				(9,306)
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of tax					36
Reduction in non-credit component of OTTI charge, net of tax	370				370
Non-credit component of OTTI charge recognized during the period, net of tax					(36)
Change in unrealized gain or loss on available-for-sale securities during the period	115				115
Adjustments to other comprehensive income from defined benefit plans, net of tax	(680)				(680)
Amortization of earned portion of ESOP stock						115
Amortization of earned portion of restricted stock awards							607
Balance at Jun. 30, 2010	314,727	511	223,802	317,088	(5,277)	(3,586)	(3,573)	(206,259)	(7,979)
Balance at Dec. 31, 2010	328,734	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 tax	688				688
Non-credit component of OTTI charge recognized during the period, net of tax					0
Change in unrealized gain or loss on available-for-sale securities during the period	44				44
Adjustments to other comprehensive income from defined benefit plans, net of tax	27				27
Amortization of earned portion of ESOP stock						116
Amortization of earned portion of restricted stock awards							700
Balance at Jun. 30, 2011	$ 347,274	$ 514	$ 228,996	$ 343,669	$ (5,561)	$ (3,354)	$ (3,915)	$ (204,441)	$ (8,634)