Allowance for Credit Losses (Individually Evaluated Impaired Loans) (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	Dec. 31, 2011
Unpaid Principal Balance
Average Recorded Investment	$ 6,017	$ 3,054	$ 5,175	$ 2,500
Interest Income Recognized	87	41	228	107
Conventional Loan [Member]
Recorded Investment
With no related allowance	508		508		645
With a related allowance	5,448		5,448		3,421
Total recorded investment	5,956		5,956		4,066
Unpaid Principal Balance
With no related allowance	505		505		640
With a related allowance	5,416		5,416		3,410
Total	5,921		5,921		4,050
Related Allowance for Credit Losses	253		253		128
Average Recorded Investment	5,841	2,749	5,094	2,398
Interest Income Recognized	87	41	228	107
Banking on Business Loans [Member]
Recorded Investment
With a related allowance	264		264		100
Total recorded investment	264		264		100
Unpaid Principal Balance
With a related allowance	264		264		100
Total	264		264		100
Related Allowance for Credit Losses	94		94		36
Average Recorded Investment	176	305	81	102
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0