Allowance for Loan Losses Schedule of Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 46,584	$ 52,920
Unpaid Principal Balance	57,768	69,926
Partial Charge-offs to Date	10,171	15,043
Related Allowance	397	718
Recorded Investment, Commercial	38,680	45,009
Unpaid Principal Balance, Commercial	49,604	61,623
Partial Charge-offs to Date, Commercial	9,911	14,652
Related Allowance, Commercial	397	718
Recorded Investment, Retail	7,904	7,911
Unpaid Principal Balance, Retail	8,164	8,303
Partial Charge-offs to Date, Retail	260	391
Related Allowance, Retail	0	0
Commercial real estate - non-owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,524	4,986
Unpaid Principal Balance	2,586	4,986
Partial Charge-offs to Date	0	0
Related Allowance	217	718
Commercial construction and land development
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,410
Unpaid Principal Balance	1,450
Partial Charge-offs to Date	0
Related Allowance	180
Total loans with a specific valuation allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,934	4,986
Unpaid Principal Balance	4,036	4,986
Partial Charge-offs to Date	0	0
Related Allowance	397	718
One-to-four family residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,041	7,202
Unpaid Principal Balance	7,206	7,504
Partial Charge-offs to Date	165	302
Related Allowance	0	0
Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Recorded Investment	713	540
Unpaid Principal Balance	808	630
Partial Charge-offs to Date	95	89
Related Allowance	0	0
Retail construction
Financing Receivable, Impaired [Line Items]
Recorded Investment	150	169
Unpaid Principal Balance	150	169
Partial Charge-offs to Date	0	0
Related Allowance	0	0
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,039	2,479
Unpaid Principal Balance	2,498	2,700
Partial Charge-offs to Date	423	216
Related Allowance	0	0
Commercial real estate - owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,082	11,203
Unpaid Principal Balance	11,201	14,557
Partial Charge-offs to Date	2,034	2,694
Related Allowance	0	0
Commercial real estate - non-owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment	18,979	20,532
Unpaid Principal Balance	21,290	28,687
Partial Charge-offs to Date	1,740	7,000
Related Allowance	0	0
Commercial real estate - multifamily
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,351	673
Unpaid Principal Balance	3,979	673
Partial Charge-offs to Date	550	0
Related Allowance	0	0
Commercial construction and land development
Financing Receivable, Impaired [Line Items]
Recorded Investment	956	2,781
Unpaid Principal Balance	1,017	2,781
Partial Charge-offs to Date	60	0
Related Allowance	0	0
Commercial participations
Financing Receivable, Impaired [Line Items]
Recorded Investment	339	2,355
Unpaid Principal Balance	5,583	7,239
Partial Charge-offs to Date	5,104	4,742
Related Allowance	0	0
Total loans without a specific valuation allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	42,650	47,934
Unpaid Principal Balance	53,732	64,940
Partial Charge-offs to Date	10,171	15,043
Related Allowance	$ 0	$ 0