Loans (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Real Estate:
Total real estate	$ 1,029,322	$ 1,151,653
Consumer
Total consumer	225,067	238,397
Commercial
Total commercial	24,799	30,146
Total loans	1,279,188	1,420,196
Less:
Allowance for loan losses	30,933	42,271
Deferred loan costs, net	(1,340)	(1,351)
Total	29,593	40,920
Loans, net	1,249,595	1,379,276
One-to four-family residential [Member]
Real Estate:
Total real estate	635,756	667,375
Multifamily residential [Member]
Real Estate:
Total real estate	98,545	120,991
Nonresidential [Member]
Real Estate:
Total real estate	229,303	276,198
Land [Member]
Real Estate:
Total real estate	19,113	23,222
One-to four-family residential and land development [Member]
Real Estate:
Total real estate	42,077	59,339
Multi-family and nonresidential [Member]
Real Estate:
Total real estate	4,528	4,528
Home Equity [Member]
Consumer
Total consumer	183,936	191,827
Auto [Member]
Consumer
Total consumer	7,908	8,933
Marine [Member]
Consumer
Total consumer	5,486	5,900
Recreational vehicle [Member]
Consumer
Total consumer	25,019	28,530
Other [Member]
Consumer
Total consumer	2,718	3,207
Secured [Member]
Commercial
Total commercial	21,784	25,120
Unsecured [Member]
Commercial
Total commercial	$ 3,015	$ 5,026