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, 2012		$ 520	$ 239,041	$ 379,166	$ (9,640)	$ (3,007)	$ (3,122)	$ (8,800)	$ (202,584)
Stock options exercised		6	8,972
Tax benefit of stock plans			704
BMP award distribution								0
Amortization of excess fair value over cost - ESOP stock and stock options expense			874
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	33,240			33,240
Cash dividends declared and paid				(14,742)
Reduction in non credit component of OTTI charge, net of taxes	12
Other comprehensive income recognized during the period, net of tax	(180)				180
Amortization of earned portion of ESOP stock						173
Amortization of earned portion of restricted stock awards							1,511
Balance at Sep. 30, 2013	422,745	526	250,105	397,664	(9,460)	(2,834)	(3,693)	(9,013)	(200,550)
Balance at Dec. 31, 2013	435,506	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			847
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	32,259			32,259
Cash dividends declared and paid				(15,075)
Reduction in non credit component of OTTI charge, net of taxes	11
Other comprehensive income recognized during the period, net of tax	(475)				475
Amortization of earned portion of ESOP stock						173
Amortization of earned portion of restricted stock awards							1,497
Balance at Sep. 30, 2014	$ 456,203	$ 529	$ 254,103	$ 420,170	$ (4,284)	$ (2,603)	$ (3,626)	$ (9,164)	$ (198,922)