Loans and Allowance for Loan Losses (Additional information about 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
Impaired loans
Average Recorded Investment	$ 1,680	$ 1,857	$ 1,701	$ 1,885
Interest recognized on impaired loans	2		3	3
Commercial and industrial [Member]
Impaired loans
Average Recorded Investment	620	528	628	542
Interest recognized on impaired loans	2		3
Commercial and industrial [Member] | Commercial [Member]
Impaired loans
Average Recorded Investment	500	470	503	479
Interest recognized on impaired loans	1		1
Commercial and industrial [Member] | SBA loans [Member]
Impaired loans
Average Recorded Investment		18		18
Interest recognized on impaired loans	1		2
Commercial and industrial [Member] | Asset-based [Member]
Impaired loans
Average Recorded Investment	120	40	125	45
Interest recognized on impaired loans
Commercial real estate [Member]
Impaired loans
Average Recorded Investment	1,060	1,329	1,703	1,343
Interest recognized on impaired loans				3
Commercial real estate [Member] | SBA loans [Member]
Impaired loans
Average Recorded Investment		58		58
Interest recognized on impaired loans
Commercial real estate [Member] | Commercial mortgages [Member]
Impaired loans
Average Recorded Investment	670	835	673	846
Interest recognized on impaired loans
Commercial real estate [Member] | Religious organizations [Member]
Impaired loans
Average Recorded Investment	390	436	400	439
Interest recognized on impaired loans				$ 3