Fair Value - Nonrecurring Measurements (Details) (Nonrecurring, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned	$ 5,281	$ 5,391
Estimated Fair Value | Impaired Loans Receivable | Construction Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	1,767	441
Estimated Fair Value | Impaired Loans Receivable | Owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	4,772	5,874
Estimated Fair Value | Impaired Loans Receivable | Non-owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	472	832
Estimated Fair Value | Impaired Loans Receivable | Commercial Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	265	403
Estimated Fair Value | Impaired Loans Receivable | One to Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	453
Estimated Fair Value | Impaired Loans Receivable | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	165
Estimated Fair Value | Impaired Loans Receivable | Home Equity Lines of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	291
Estimated Fair Value | Impaired Loans Receivable | Consumer and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned	0	0
Level 1 | Impaired Loans Receivable | Construction Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | Owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | Non-owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | Commercial Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | One to Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | Home Equity Lines of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 1 | Impaired Loans Receivable | Consumer and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned	0	0
Level 2 | Impaired Loans Receivable | Construction Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | Owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | Non-owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | Commercial Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | One to Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | Home Equity Lines of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 2 | Impaired Loans Receivable | Consumer and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Other real estate owned	5,281	5,391
Level 3 | Impaired Loans Receivable | Construction Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	1,767	441
Level 3 | Impaired Loans Receivable | Owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	4,772	5,874
Level 3 | Impaired Loans Receivable | Non-owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	472	832
Level 3 | Impaired Loans Receivable | Commercial Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	265	403
Level 3 | Impaired Loans Receivable | One to Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	453
Level 3 | Impaired Loans Receivable | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	165
Level 3 | Impaired Loans Receivable | Home Equity Lines of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	0	291
Level 3 | Impaired Loans Receivable | Consumer and Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	$ 0	$ 0