Loans and Leases - Impaired Loans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Impaired Loans [Abstract]
Cash collected on non accrual and impaired loan	$ 257,000	$ 1,300,000
Amount credited to principal balance outstanding	257,000	1,100,000
Summary of impaired loans [Abstract]
Impaired loans with a valuation allowance	1,598,000		$ 2,414,000
Impaired loans without a valuation allowance	4,868,000		4,777,000
Valuation allowance related to impaired loans	210,000		$ 398,000
Average recorded investment [Abstract]
Average investment in impaired loans and leases	6,884,000	15,198,000
Interest income recognized on a cash basis on impaired loans and leases	$ 0	$ 135,000