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]	Common Stock Held by BMP [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2013		$ 528	$ 252,253	$ 402,986	$ (4,759)	$ (2,776)	$ (3,193)	$ (9,013)	$ (200,520)
Stock options exercised		1	278
Tax benefit of stock plans			71
BMP award distribution								1
Amortization of excess fair value over cost - ESOP stock and stock options expense			584
Release from treasury stock for equity awards, net of return of shares to treasury for forfeited shares			654				(1,930)	(152)
Release of stock for benefit plan awards	$ (171)
Net income	20,494			20,494
Cash dividends declared and paid				(10,043)
Reduction in non credit component of OTTI charge, net of taxes	8
Other comprehensive income recognized during the period, net of tax	(351)				351
Amortization of earned portion of ESOP stock						116
Amortization of earned portion of restricted stock awards							995
Treasury shares repurchased	0
Balance at Jun. 30, 2014	448,524	529	253,840	413,437	(4,408)	(2,660)	(4,128)	(9,164)	(198,922)
Balance at Dec. 31, 2014	459,725	529	254,358	427,126	(8,547)	(2,545)	(3,066)	(9,164)	(198,966)
Stock options exercised		3	4,053
Tax benefit of stock plans			204
BMP award distribution								0
Amortization of excess fair value over cost - ESOP stock and stock options expense			541
Release from treasury stock for equity awards, net of return of shares to treasury for forfeited shares			481				(1,084)	(190)
Release of stock for benefit plan awards	(213)
Net income	23,307			23,307
Cash dividends declared and paid				(10,098)
Reduction in non credit component of OTTI charge, net of taxes	(15)
Other comprehensive income recognized during the period, net of tax	802				(802)
Amortization of earned portion of ESOP stock						116
Amortization of earned portion of restricted stock awards							985
Treasury shares repurchased	(300)
Balance at Jun. 30, 2015	$ 477,947	$ 532	$ 259,637	$ 440,335	$ (9,349)	$ (2,429)	$ (3,165)	$ (9,354)	$ (198,260)