Loans (Details 10) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Risk category of loans by class of loans
Total loans	$ 1,086,156	$ 1,420,196
Unclassified [Member]
Risk category of loans by class of loans
Total loans	1,003,830	1,164,590
Special Mention [Member]
Risk category of loans by class of loans
Total loans	22,447	35,178
Classified [Member]
Risk category of loans by class of loans
Total loans	59,879	220,428
Substandard [Member]
Risk category of loans by class of loans
Total loans	59,879	220,399
Doubtful [Member]
Risk category of loans by class of loans
Total loans		29
Classified Loss [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member]
Risk category of loans by class of loans
Total loans	812,168	1,087,786
Permanent Real Estate Loans [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	577,249	667,375
Permanent Real Estate Loans [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	80,923	120,991
Permanent Real Estate Loans [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	138,188	276,198
Permanent Real Estate Loans [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	15,808	23,222
Permanent Real Estate Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	747,135	876,681
Permanent Real Estate Loans [Member] | Unclassified [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	569,204	626,072
Permanent Real Estate Loans [Member] | Unclassified [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	69,060	90,820
Permanent Real Estate Loans [Member] | Unclassified [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	99,275	149,314
Permanent Real Estate Loans [Member] | Unclassified [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	9,596	10,475
Permanent Real Estate Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	21,382	32,074
Permanent Real Estate Loans [Member] | Special Mention [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	459	4,094
Permanent Real Estate Loans [Member] | Special Mention [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	8,409	8,392
Permanent Real Estate Loans [Member] | Special Mention [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	12,234	18,388
Permanent Real Estate Loans [Member] | Special Mention [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	280	1,200
Permanent Real Estate Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	43,651	179,031
Permanent Real Estate Loans [Member] | Classified [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	7,586	37,209
Permanent Real Estate Loans [Member] | Classified [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	3,454	21,779
Permanent Real Estate Loans [Member] | Classified [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	26,679	108,496
Permanent Real Estate Loans [Member] | Classified [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	5,932	11,547
Permanent Real Estate Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	43,651	179,031
Permanent Real Estate Loans [Member] | Substandard [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	7,586	37,209
Permanent Real Estate Loans [Member] | Substandard [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	3,454	21,779
Permanent Real Estate Loans [Member] | Substandard [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	26,679	108,496
Permanent Real Estate Loans [Member] | Substandard [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	5,932	11,547
Permanent Real Estate Loans [Member] | Doubtful [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Doubtful [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Doubtful [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Doubtful [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Doubtful [Member] | Land [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Classified Loss [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Classified Loss [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Classified Loss [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Classified Loss [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans
Permanent Real Estate Loans [Member] | Classified Loss [Member] | Land [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member]
Risk category of loans by class of loans
Total loans	32,852	63,867
Construction Loans [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	28,318	59,339
Construction Loans [Member] | Multifamily and nonresidential [Member]
Risk category of loans by class of loans
Total loans	4,534	4,528
Construction Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	25,111	32,924
Construction Loans [Member] | Unclassified [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	20,577	28,396
Construction Loans [Member] | Unclassified [Member] | Multifamily and nonresidential [Member]
Risk category of loans by class of loans
Total loans	4,534	4,528
Construction Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	196	2,394
Construction Loans [Member] | Special Mention [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	196	2,394
Construction Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	7,545	28,549
Construction Loans [Member] | Classified [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	7,545	28,549
Construction Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	7,545	28,520
Construction Loans [Member] | Substandard [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	7,545	28,520
Construction Loans [Member] | Doubtful [Member]
Risk category of loans by class of loans
Total loans		29
Construction Loans [Member] | Doubtful [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans		29
Construction Loans [Member] | Doubtful [Member] | Multifamily and nonresidential [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member] | Classified Loss [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member] | Classified Loss [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member] | Classified Loss [Member] | Multifamily and nonresidential [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member]
Risk category of loans by class of loans
Total loans	214,593	238,397
Consumer Loans [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	177,230	191,827
Consumer Loans [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	7,648	8,933
Consumer Loans [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	4,942	5,900
Consumer Loans [Member] | Recreational vehicles [Member]
Risk category of loans by class of loans
Total loans	22,250	28,530
Consumer Loans [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	2,523	3,207
Consumer Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	209,260	231,229
Consumer Loans [Member] | Unclassified [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	173,696	187,153
Consumer Loans [Member] | Unclassified [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	7,453	8,738
Consumer Loans [Member] | Unclassified [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	4,745	5,418
Consumer Loans [Member] | Unclassified [Member] | Recreational vehicles [Member]
Risk category of loans by class of loans
Total loans	20,859	26,728
Consumer Loans [Member] | Unclassified [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	2,507	3,192
Consumer Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	89	281
Consumer Loans [Member] | Special Mention [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	82	269
Consumer Loans [Member] | Special Mention [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	7	12
Consumer Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	5,244	6,887
Consumer Loans [Member] | Classified [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	3,534	4,405
Consumer Loans [Member] | Classified [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	113	183
Consumer Loans [Member] | Classified [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	190	482
Consumer Loans [Member] | Classified [Member] | Recreational vehicles [Member]
Risk category of loans by class of loans
Total loans	1,391	1,802
Consumer Loans [Member] | Classified [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	16	15
Consumer Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	5,244	6,887
Consumer Loans [Member] | Substandard [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	3,534	4,405
Consumer Loans [Member] | Substandard [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	113	183
Consumer Loans [Member] | Substandard [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	190	482
Consumer Loans [Member] | Substandard [Member] | Recreational vehicles [Member]
Risk category of loans by class of loans
Total loans	1,391	1,802
Consumer Loans [Member] | Substandard [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	16	15
Consumer Loans [Member] | Doubtful [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Doubtful [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Doubtful [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Doubtful [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Doubtful [Member] | Recreational vehicles [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Doubtful [Member] | Other [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified Loss [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified Loss [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified Loss [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified Loss [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified Loss [Member] | Recreational vehicles [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified Loss [Member] | Other [Member]
Risk category of loans by class of loans
Total loans
Commercial Loans [Member]
Risk category of loans by class of loans
Total loans	26,543	30,146
Commercial Loans [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	24,243	25,120
Commercial Loans [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	2,300	5,026
Commercial Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	22,324	23,756
Commercial Loans [Member] | Unclassified [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	20,843	20,895
Commercial Loans [Member] | Unclassified [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	1,481	2,861
Commercial Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	780	429
Commercial Loans [Member] | Special Mention [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	769	263
Commercial Loans [Member] | Special Mention [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	11	166
Commercial Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	3,439	5,961
Commercial Loans [Member] | Classified [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	2,631	3,962
Commercial Loans [Member] | Classified [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	808	1,999
Commercial Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	3,439	5,961
Commercial Loans [Member] | Substandard [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	2,631	3,962
Commercial Loans [Member] | Substandard [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	808	1,999
Commercial Loans [Member] | Doubtful [Member]
Risk category of loans by class of loans
Total loans
Commercial Loans [Member] | Doubtful [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans
Commercial Loans [Member] | Doubtful [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans
Commercial Loans [Member] | Classified Loss [Member]
Risk category of loans by class of loans
Total loans
Commercial Loans [Member] | Classified Loss [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans
Commercial Loans [Member] | Classified Loss [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans