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)
BMP reclassification			8,007	132
Amortization of excess fair value over cost - ESOP stock and stock options expense			1,303
Release from treasury stock for restricted stock award and BMP benefit shares			47				(1,824)	1,777	28
Net income	30,829			30,829
Cash dividends declared and paid				(13,971)
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of tax					51
Reduction in non-credit component of OTTI charge, net of tax	1,101				1,101
Non-credit component of OTTI charge recognized during the period, net of tax					(156)
Change in unrealized gain or loss on available-for-sale securities during the period					(307)
Adjustments to other comprehensive income from defined benefit plans, net of tax	(680)				(680)
Amortization of earned portion of ESOP stock						173
Amortization of earned portion of restricted stock awards							954
Balance at Sep. 30, 2010		511	224,239	323,777	(5,073)	(3,528)	(3,226)	(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		3	2,627
Forfeited restricted stock award shares returned to treasury stock			2				22	(24)
Tax benefit (expense) of stock plans			399
Amortization of excess fair value over cost - ESOP stock and stock options expense			1,082
Release from treasury stock for restricted stock award and BMP benefit shares			501				(1,953)	2,128	(676)
Net income	34,582			34,582
Cash dividends declared and paid				(14,156)
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of tax					47
Reduction in non-credit component of OTTI charge, net of tax	693				693
Non-credit component of OTTI charge recognized during the period, net of tax					(13)
Change in unrealized gain or loss on available-for-sale securities during the period					(545)
Adjustments to other comprehensive income from defined benefit plans, net of tax	27				27
Amortization of earned portion of ESOP stock						173
Amortization of earned portion of restricted stock awards							1,139
Balance at Sep. 30, 2011	$ 354,792	$ 515	$ 230,196	$ 350,094	$ (6,143)	$ (3,297)	$ (3,476)	$ (204,442)	$ (8,655)