Loans and Leases (Details 4) (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
Summary of impaired loans
Impaired loans, Unpaid Contractual Principal Balance	$ 3,564		$ 3,564		$ 3,891
Impaired loans, Recorded Investment With No Allowance	816		816		1,407
Impaired loans, Recorded Investment With Allowance	2,748		2,748		2,484
Impaired loans, Total Recorded Investment	3,564		3,564		3,891
Impaired loans, Related Allowance	819		819		836
Impaired loans, Average Recorded Investment	3,666	4,060	3,645	4,274
Commercial and other Loans [Member]
Summary of impaired loans
Impaired loans, Unpaid Contractual Principal Balance	34		34		46
Impaired loans, Recorded Investment With No Allowance	10		10		39
Impaired loans, Recorded Investment With Allowance	24		24		7
Impaired loans, Total Recorded Investment	34		34		46
Impaired loans, Related Allowance	24		24		7
Impaired loans, Average Recorded Investment	33	42	32	44
Commercial real estate [Member]
Summary of impaired loans
Impaired loans, Unpaid Contractual Principal Balance	3,296		3,296		3,533
Impaired loans, Recorded Investment With No Allowance	572		572		1,056
Impaired loans, Recorded Investment With Allowance	2,724		2,724		2,477
Impaired loans, Total Recorded Investment	3,296		3,296		3,533
Impaired loans, Related Allowance	795		795		829
Impaired loans, Average Recorded Investment	3,105	3,688	3,088	3,883
Consumer real estate [Member]
Summary of impaired loans
Impaired loans, Unpaid Contractual Principal Balance	234		234		312
Impaired loans, Recorded Investment With No Allowance	234		234		312
Impaired loans, Recorded Investment With Allowance
Impaired loans, Total Recorded Investment	234		234		312
Impaired loans, Related Allowance
Impaired loans, Average Recorded Investment	$ 528	$ 330	$ 525	$ 347