Loans and Allowance for Loan Losses (Details 3) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Impaired loans:    
Impaired loans with an allowance for loan losses $ 1,868 $ 31
Impaired loans with no allowance for loan losses 5,284 7,026
Total impaired loans 7,152 7,057
Unpaid principal balance of impaired loans 7,152 7,057
Allowance for loan losses on impaired loans 232 19
Average recorded investment in impaired loans 7,185 7,834
Nonperforming loans:    
Nonaccrual loans 6,925 207
Loans past due 90 days and still accruing      
Troubled debt restructurings (not included in nonaccrual loans) 229 6,819
Total nonperforming loans 7,154 7,026
Commercial business [Member]
   
Impaired loans:    
Impaired loans with an allowance for loan losses      
Impaired loans with no allowance for loan losses      
Total impaired loans      
Unpaid principal balance of impaired loans      
Allowance for loan losses on impaired loans      
Average recorded investment in impaired loans    177
Nonperforming loans:    
Nonaccrual loans      
Loans past due 90 days and still accruing      
Troubled debt restructurings (not included in nonaccrual loans)      
Total nonperforming loans      
Commercial real estate [Member]
   
Impaired loans:    
Impaired loans with an allowance for loan losses 1,463   
Impaired loans with no allowance for loan losses 3,734 5,258
Total impaired loans 5,197 5,258
Unpaid principal balance of impaired loans 5,197 5,258
Allowance for loan losses on impaired loans 130   
Average recorded investment in impaired loans 5,237 5,319
Nonperforming loans:    
Nonaccrual loans 5,197   
Loans past due 90 days and still accruing      
Troubled debt restructurings (not included in nonaccrual loans)    5,258
Total nonperforming loans 5,197 5,258
One-to-four family [Member]
   
Impaired loans:    
Impaired loans with an allowance for loan losses 392 16
Impaired loans with no allowance for loan losses 1,540 1,741
Total impaired loans 1,932 1,757
Unpaid principal balance of impaired loans 1,932 1,757
Allowance for loan losses on impaired loans 98 14
Average recorded investment in impaired loans 1,914 2,203
Nonperforming loans:    
Nonaccrual loans 1,715 207
Loans past due 90 days and still accruing      
Troubled debt restructurings (not included in nonaccrual loans) 208 1,497
Total nonperforming loans 1,923 1,704
Home equity [Member]
   
Impaired loans:    
Impaired loans with an allowance for loan losses      
Impaired loans with no allowance for loan losses    12
Total impaired loans    12
Unpaid principal balance of impaired loans    12
Allowance for loan losses on impaired loans      
Average recorded investment in impaired loans 8 101
Nonperforming loans:    
Nonaccrual loans      
Loans past due 90 days and still accruing      
Troubled debt restructurings (not included in nonaccrual loans)      
Total nonperforming loans      
Consumer [Member]
   
Impaired loans:    
Impaired loans with an allowance for loan losses 13 15
Impaired loans with no allowance for loan losses 10 15
Total impaired loans 23 30
Unpaid principal balance of impaired loans 23 30
Allowance for loan losses on impaired loans 4 5
Average recorded investment in impaired loans 26 34
Nonperforming loans:    
Nonaccrual loans 13   
Loans past due 90 days and still accruing      
Troubled debt restructurings (not included in nonaccrual loans) 21 64
Total nonperforming loans $ 34 $ 64