Allowance for Credit Losses (TDR Modifications) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Modifications [Line Items]
Pre-Modification	$ 2,130	$ 645	$ 3,091	$ 2,368
Post-Modification	2,009	634	2,935	2,322
Conventional Loan [Member]
Financing Receivable, Modifications [Line Items]
Pre-Modification	1,866	340	2,827	2,063
Post-Modification	1,745	329	2,671	2,017
Banking on Business Loans [Member]
Financing Receivable, Modifications [Line Items]
Pre-Modification	264	305	264	305
Post-Modification	$ 264	$ 305	$ 264	$ 305