Allowance for Loan and Lease Losses - Impaired LHFI - Average Recorded Investment and Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Average recorded investment [Abstract]
Average recorded investment	$ 13,270	$ 16,159	$ 14,142	$ 16,973
Interest income recognized [Abstract]
Interest income recognized	81	95	297	196
Commercial real estate [Member]
Average recorded investment [Abstract]
Average recorded investment	5,843	4,710	6,231	4,972
Interest income recognized [Abstract]
Interest income recognized	32	32	199	63
Construction and land development [Member]
Average recorded investment [Abstract]
Average recorded investment	584	3,001	611	3,341
Interest income recognized [Abstract]
Interest income recognized		12		26
Commercial and industrial [Member]
Average recorded investment [Abstract]
Average recorded investment	4,856	6,395	5,216	6,939
Interest income recognized [Abstract]
Interest income recognized	49	51	98	107
Residential real estate [Member]
Average recorded investment [Abstract]
Average recorded investment	971	817	963	766
Leases [Member]
Average recorded investment [Abstract]
Average recorded investment	73	97	70	129
Tax certificates [Member]
Average recorded investment [Abstract]
Average recorded investment	$ 943	$ 1,139	$ 1,051	$ 826