Loans (Details 8) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Risk category of loans by class of loans
Total loans	$ 1,279,188	$ 1,420,196
Unclassified [Member]
Risk category of loans by class of loans
Total loans	1,069,883	1,164,590
Special Mention [Member]
Risk category of loans by class of loans
Total loans	37,466	35,178
Classified [Member]
Risk category of loans by class of loans
Total loans	171,839	220,428
Substandard [Member]
Risk category of loans by class of loans
Total loans	171,814	220,399
Doubtful [Member]
Risk category of loans by class of loans
Total loans	25	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	982,718	1,087,786
Permanent Real Estate Loans [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	635,756	667,375
Permanent Real Estate Loans [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	98,545	120,991
Permanent Real Estate Loans [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	229,303	276,198
Permanent Real Estate Loans [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	19,113	23,222
Permanent Real Estate Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	805,682	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	598,449	626,072
Permanent Real Estate Loans [Member] | Unclassified [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	71,022	90,820
Permanent Real Estate Loans [Member] | Unclassified [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	126,419	149,314
Permanent Real Estate Loans [Member] | Unclassified [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	9,792	10,475
Permanent Real Estate Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	34,911	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	1,865	4,094
Permanent Real Estate Loans [Member] | Special Mention [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	10,367	8,392
Permanent Real Estate Loans [Member] | Special Mention [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	21,797	18,388
Permanent Real Estate Loans [Member] | Special Mention [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	882	1,200
Permanent Real Estate Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	142,124	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	35,442	37,209
Permanent Real Estate Loans [Member] | Classified [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	17,156	21,779
Permanent Real Estate Loans [Member] | Classified [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	81,087	108,496
Permanent Real Estate Loans [Member] | Classified [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	8,439	11,547
Permanent Real Estate Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	142,124	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	35,442	37,209
Permanent Real Estate Loans [Member] | Substandard [Member] | Multifamily residential [Member]
Risk category of loans by class of loans
Total loans	17,156	21,779
Permanent Real Estate Loans [Member] | Substandard [Member] | Nonresidential [Member]
Risk category of loans by class of loans
Total loans	81,087	108,496
Permanent Real Estate Loans [Member] | Substandard [Member] | Land [Member]
Risk category of loans by class of loans
Total loans	8,439	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	46,604	63,867
Construction Loans [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	42,077	59,339
Construction Loans [Member] | Multifamily and nonresidential construction [Member]
Risk category of loans by class of loans
Total loans	4,528	4,528
Construction Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	26,419	32,924
Construction Loans [Member] | Unclassified [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	21,891	28,396
Construction Loans [Member] | Unclassified [Member] | Multifamily and nonresidential construction [Member]
Risk category of loans by class of loans
Total loans	4,528	4,528
Construction Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	1,654	2,394
Construction Loans [Member] | Special Mention [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	1,654	2,394
Construction Loans [Member] | Special Mention [Member] | Multifamily and nonresidential construction [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	18,532	28,549
Construction Loans [Member] | Classified [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	18,532	28,549
Construction Loans [Member] | Classified [Member] | Multifamily and nonresidential construction [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	18,507	28,520
Construction Loans [Member] | Substandard [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	18,507	28,520
Construction Loans [Member] | Substandard [Member] | Multifamily and nonresidential construction [Member]
Risk category of loans by class of loans
Total loans
Construction Loans [Member] | Doubtful [Member]
Risk category of loans by class of loans
Total loans	25	29
Construction Loans [Member] | Doubtful [Member] | One-to four-family residential [Member]
Risk category of loans by class of loans
Total loans	25	29
Construction Loans [Member] | Doubtful [Member] | Multifamily and nonresidential construction [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 construction [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member]
Risk category of loans by class of loans
Total loans	225,067	238,397
Consumer Loans [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	183,936	191,827
Consumer Loans [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	7,908	8,933
Consumer Loans [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	5,486	5,900
Consumer Loans [Member] | Recreational vehicle [Member]
Risk category of loans by class of loans
Total loans	25,019	28,530
Consumer Loans [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	2,718	3,207
Consumer Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	217,644	231,229
Consumer Loans [Member] | Unclassified [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	178,667	187,153
Consumer Loans [Member] | Unclassified [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	7,563	8,738
Consumer Loans [Member] | Unclassified [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	5,122	5,418
Consumer Loans [Member] | Unclassified [Member] | Recreational vehicle [Member]
Risk category of loans by class of loans
Total loans	23,604	26,728
Consumer Loans [Member] | Unclassified [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	2,688	3,192
Consumer Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	238	281
Consumer Loans [Member] | Special Mention [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans		269
Consumer Loans [Member] | Special Mention [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	228	12
Consumer Loans [Member] | Special Mention [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	10
Consumer Loans [Member] | Special Mention [Member] | Recreational vehicle [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Special Mention [Member] | Other [Member]
Risk category of loans by class of loans
Total loans
Consumer Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	7,185	6,887
Consumer Loans [Member] | Classified [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	5,269	4,405
Consumer Loans [Member] | Classified [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	117	183
Consumer Loans [Member] | Classified [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	354	482
Consumer Loans [Member] | Classified [Member] | Recreational vehicle [Member]
Risk category of loans by class of loans
Total loans	1,415	1,802
Consumer Loans [Member] | Classified [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	30	15
Consumer Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	7,185	6,887
Consumer Loans [Member] | Substandard [Member] | Home Equity [Member]
Risk category of loans by class of loans
Total loans	5,269	4,405
Consumer Loans [Member] | Substandard [Member] | Auto [Member]
Risk category of loans by class of loans
Total loans	117	183
Consumer Loans [Member] | Substandard [Member] | Marine [Member]
Risk category of loans by class of loans
Total loans	354	482
Consumer Loans [Member] | Substandard [Member] | Recreational vehicle [Member]
Risk category of loans by class of loans
Total loans	1,415	1,802
Consumer Loans [Member] | Substandard [Member] | Other [Member]
Risk category of loans by class of loans
Total loans	30	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 vehicle [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 vehicle [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	24,799	30,146
Commercial Loans [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	21,784	25,120
Commercial Loans [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	3,015	5,026
Commercial Loans [Member] | Unclassified [Member]
Risk category of loans by class of loans
Total loans	20,138	23,756
Commercial Loans [Member] | Unclassified [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	18,283	20,895
Commercial Loans [Member] | Unclassified [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	1,855	2,861
Commercial Loans [Member] | Special Mention [Member]
Risk category of loans by class of loans
Total loans	663	429
Commercial Loans [Member] | Special Mention [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	413	263
Commercial Loans [Member] | Special Mention [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	250	166
Commercial Loans [Member] | Classified [Member]
Risk category of loans by class of loans
Total loans	3,998	5,961
Commercial Loans [Member] | Classified [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	3,088	3,962
Commercial Loans [Member] | Classified [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	910	1,999
Commercial Loans [Member] | Substandard [Member]
Risk category of loans by class of loans
Total loans	3,998	5,961
Commercial Loans [Member] | Substandard [Member] | Secured [Member]
Risk category of loans by class of loans
Total loans	3,088	3,962
Commercial Loans [Member] | Substandard [Member] | Unsecured [Member]
Risk category of loans by class of loans
Total loans	910	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