Allowance for Loan Losses Schedule of Troubled Debt Restructurings by Loan Category and Accruing Status (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Modifications [Line Items]
Accruing	$ 17,616,000	$ 8,875,000
Non-accruing	9,369,000	16,974,000
Total	26,985,000	25,849,000	39,581,000
Financing Receivable, Modifications, Performing in Accordance with their Modified Terms and on Non-accrual	4,500,000
One-to-four family residential
Financing Receivable, Modifications [Line Items]
Accruing	1,370,000	2,266,000
Non-accruing	3,307,000	1,600,000
Total	4,677,000	3,866,000
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Accruing	543,000	2,167,000
Non-accruing	228,000	259,000
Total	771,000	2,426,000
Commercial real estate - owner occupied
Financing Receivable, Modifications [Line Items]
Accruing	3,926,000	369,000
Non-accruing	2,434,000	2,272,000
Total	6,360,000	2,641,000
Commercial real estate - non-owner occupied
Financing Receivable, Modifications [Line Items]
Accruing	11,524,000	3,814,000
Non-accruing	3,057,000	11,095,000
Total	14,581,000	14,909,000
Commercial real estate - multifamily
Financing Receivable, Modifications [Line Items]
Accruing	253,000	259,000
Non-accruing	0	0
Total	253,000	259,000
Commercial construction and land development
Financing Receivable, Modifications [Line Items]
Accruing	0	0
Non-accruing	250,000	0
Total	250,000	0
Commercial participations
Financing Receivable, Modifications [Line Items]
Accruing	0	0
Non-accruing	93,000	1,748,000
Total	93,000	1,748,000
Total commercial loans
Financing Receivable, Modifications [Line Items]
Accruing	16,246,000	6,609,000
Non-accruing	6,062,000	15,374,000
Total	$ 22,308,000	$ 21,983,000