Loans (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Impaired Financing Receivables by Class
With a specific allowance recorded, Allowance for loan losses allocated		$ 11,823
Total Unpaid Principal Balance		218,266
Total Recorded Investment		153,567
Permanent Real Estate Loans [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	73,764	75,817
With no specific allowance recorded, Recorded Investment	64,437	68,388
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	42,283	53,839
With a specific allowance recorded, Recorded investment	35,756	46,902
With a specific allowance recorded, Allowance for loan losses allocated	5,328	8,275
Permanent Real Estate Loans [Member] | One-to four-family residential [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance		32,372
With no specific allowance recorded, Recorded Investment		28,566
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance		2,487
With a specific allowance recorded, Recorded investment		1,721
With a specific allowance recorded, Allowance for loan losses allocated		152
Permanent Real Estate Loans [Member] | Multifamily residential [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	7,190	5,112
With no specific allowance recorded, Recorded Investment	4,861	4,205
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	5,572	4,077
With a specific allowance recorded, Recorded investment	5,193	2,387
With a specific allowance recorded, Allowance for loan losses allocated	731	187
Permanent Real Estate Loans [Member] | Nonresidential [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	26,409	29,120
With no specific allowance recorded, Recorded Investment	24,740	28,327
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	27,410	42,201
With a specific allowance recorded, Recorded investment	23,820	38,176
With a specific allowance recorded, Allowance for loan losses allocated	3,469	6,127
Permanent Real Estate Loans [Member] | Land [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	7,091	9,213
With no specific allowance recorded, Recorded Investment	5,796	7,290
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	5,332	5,074
With a specific allowance recorded, Recorded investment	3,139	4,618
With a specific allowance recorded, Allowance for loan losses allocated	480	1,809
Construction Loans [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	14,823	19,788
With no specific allowance recorded, Recorded Investment	7,760	12,532
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	29,580	35,759
With a specific allowance recorded, Recorded investment	12,398	18,055
With a specific allowance recorded, Allowance for loan losses allocated	1,498	3,102
Construction Loans [Member] | One-to four-family residential [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance		19,081
With no specific allowance recorded, Recorded Investment		12,532
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance		35,759
With a specific allowance recorded, Recorded investment		18,055
With a specific allowance recorded, Allowance for loan losses allocated		3,102
Construction Loans [Member] | Multifamily and nonresidential construction [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance		707
With no specific allowance recorded, Recorded Investment
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance
With a specific allowance recorded, Recorded investment
With a specific allowance recorded, Allowance for loan losses allocated
Consumer Loans [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	7,515	5,021
With no specific allowance recorded, Recorded Investment	6,031	3,216
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	88	570
With a specific allowance recorded, Recorded investment	36	518
With a specific allowance recorded, Allowance for loan losses allocated	18	236
Consumer Loans [Member] | Home Equity [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	6,122	4,908
With no specific allowance recorded, Recorded Investment	4,953	3,139
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance
With a specific allowance recorded, Recorded investment
With a specific allowance recorded, Allowance for loan losses allocated
Consumer Loans [Member] | Auto [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	78	80
With no specific allowance recorded, Recorded Investment	58	59
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance
With a specific allowance recorded, Recorded investment
With a specific allowance recorded, Allowance for loan losses allocated
Consumer Loans [Member] | Marine [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	368
With no specific allowance recorded, Recorded Investment	354
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance		482
With a specific allowance recorded, Recorded investment		482
With a specific allowance recorded, Allowance for loan losses allocated		218
Consumer Loans [Member] | Recreational vehicle [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	940	26
With no specific allowance recorded, Recorded Investment	659	11
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	88	88
With a specific allowance recorded, Recorded investment	36	36
With a specific allowance recorded, Allowance for loan losses allocated	18	18
Consumer Loans [Member] | Other [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	7	7
With no specific allowance recorded, Recorded Investment	7	7
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance
With a specific allowance recorded, Recorded investment
With a specific allowance recorded, Allowance for loan losses allocated
Commercial Loans [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	19,021	26,591
With no specific allowance recorded, Recorded Investment	1,704	3,455
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	72,894	881
With a specific allowance recorded, Recorded investment	48,775	501
With a specific allowance recorded, Allowance for loan losses allocated	7,029	210
Total Unpaid Principal Balance	115,123
Total Recorded Investment	79,932
Commercial Loans [Member] | Secured [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	2,317	3,875
With no specific allowance recorded, Recorded Investment	1,497	3,084
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance	943	776
With a specific allowance recorded, Recorded investment	585	427
With a specific allowance recorded, Allowance for loan losses allocated	185	136
Commercial Loans [Member] | Unsecured [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Unpaid principal Balance	16,704	22,716
With no specific allowance recorded, Recorded Investment	207	371
With no specific allowance recorded, Allowance for loan losses allocated
With a specific allowance recorded, Unpaid principal balance		105
With a specific allowance recorded, Recorded investment		74
With a specific allowance recorded, Allowance for loan losses allocated		74
With Specific Allowance Recorded [Member]
Impaired Financing Receivables by Class
With a specific allowance recorded, Unpaid principal balance		91,049
With a specific allowance recorded, Recorded investment		65,976
With a specific allowance recorded, Allowance for loan losses allocated		11,823
With no Specific Allowance Recorded [Member]
Impaired Financing Receivables by Class
With no specific allowance recorded, Allowance for loan losses allocated
Total Unpaid Principal Balance		127,217
Total Recorded Investment		$ 87,591