Loans and the Allowance for Loan and Lease Losses (Details) - Purchase credit impaired loans - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loans and the Allowance for Loan and Lease Losses (Details) - Purchase credit impaired loans [Line Items]
Total carrying amount	$ 9,240	$ 9,821
Commercial Portfolio Segment [Member]
Loans and the Allowance for Loan and Lease Losses (Details) - Purchase credit impaired loans [Line Items]
Total carrying amount	7,120	7,199
Commercial Real Estate Portfolio Segment [Member]
Loans and the Allowance for Loan and Lease Losses (Details) - Purchase credit impaired loans [Line Items]
Total carrying amount	1,803	1,816
Residential Portfolio Segment [Member]
Loans and the Allowance for Loan and Lease Losses (Details) - Purchase credit impaired loans [Line Items]
Total carrying amount	$ 317	$ 806