Loans and Allowance for Loan Losses - Loans Receivable (Details) (USD $)					6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011		Jun. 30, 2011	Jun. 30, 2012 Non-owner Occupied	Jun. 30, 2012 Real Estate Loans Construction Loans	Dec. 31, 2011 Real Estate Loans Construction Loans	Jun. 30, 2012 Real Estate Loans Commercial Real Estate	Dec. 31, 2011 Real Estate Loans Commercial Real Estate	Jun. 30, 2012 Real Estate Loans Owner Occupied	Dec. 31, 2011 Real Estate Loans Owner Occupied	Jun. 30, 2012 Real Estate Loans Non-owner Occupied	Dec. 31, 2011 Real Estate Loans Non-owner Occupied	Jun. 30, 2012 Real Estate Loans One to Four Family	Dec. 31, 2011 Real Estate Loans One to Four Family	Jun. 30, 2012 Real Estate Loans Multifamily	Dec. 31, 2011 Real Estate Loans Multifamily	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit	Jun. 30, 2012 Commercial	Dec. 31, 2011 Commercial	Jun. 30, 2012 Consumer and other	Dec. 31, 2011 Consumer and other
Loans Receivable
Loans	$ 1,371,240,000	$ 1,450,039,000				$ 189,840,000	$ 202,803,000	$ 551,400,000	$ 591,800,000	$ 335,107,000	$ 348,931,000	$ 216,290,000	$ 242,827,000	$ 174,474,000	$ 179,047,000	$ 36,700,000	$ 39,881,000	$ 196,547,000	$ 201,220,000	$ 167,840,000	$ 177,047,000	$ 54,442,000	$ 58,283,000
Less: Net deferred loan origination fees	1,141,000	885,000
Allowance for loan losses	(28,797,000)	(32,848,000)	[1]
Net loans	1,343,584,000	1,418,076,000	[1]	1,468,615,000
Transfer from loans held-for-investment to loans held-for-sale					7,600,000
Transfer of loans to held-for-sale, amount charged off to record loan at fair value					$ 912,000

[1] Derived from audited consolidated financial statements