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, 2012		$ 520	$ 239,041	$ 379,166	$ (9,640)	$ (3,007)	$ (3,122)	$ (202,584)	$ (8,800)
Stock options exercised		2	2,283
Tax benefit of stock plans			201
BMP award distribution									0
Amortization of excess fair value over cost - ESOP stock and stock options expense			566
Release from treasury stock for equity awards, net of return of shares to treasury for forfeited shares			514				(2,082)	2,034
Release of stock for benefit plan awards	(253)								(213)
Net income	22,609			22,609
Cash dividends declared and paid				(9,786)
Reduction in non credit component of OTTI charge, net of taxes	8
Other comprehensive income recognized during the period, net of tax	(76)				76
Amortization of earned portion of ESOP stock						115
Amortization of earned portion of restricted stock awards							1,012
Balance at Jun. 30, 2013	408,905	522	242,605	391,989	(9,564)	(2,892)	(4,192)	(200,550)	(9,013)
Balance at Dec. 31, 2013	435,506	528	252,253	402,986	(4,759)	(2,776)	(3,193)	(200,520)	(9,013)
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)	1,598
Release of stock for benefit plan awards	(170)								(152)
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
Balance at Jun. 30, 2014	$ 448,524	$ 529	$ 253,840	$ 413,437	$ (4,408)	$ (2,660)	$ (4,128)	$ (198,922)	$ (9,164)