Allowance for Loan and Lease Losses - Impaired LHFI - Average Recorded Investment and Interest Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Average recorded investment [Abstract]
Average recorded investment	$ 15,531	$ 24,897	$ 16,602	$ 25,517
Interest income recognized [Abstract]
Interest income recognized	96	169	292	442
Commercial real estate [Member]
Average recorded investment [Abstract]
Average recorded investment	5,571	11,676	5,258	4,556
Interest income recognized [Abstract]
Interest income recognized	33	59	65	45
Construction and land development [Member]
Average recorded investment [Abstract]
Average recorded investment	1,673	4,047	2,823	10,779
Interest income recognized [Abstract]
Interest income recognized	11	18	68	129
Commercial and industrial [Member]
Average recorded investment [Abstract]
Average recorded investment	6,085	8,050	6,658	8,988
Interest income recognized [Abstract]
Interest income recognized	52	92	159	241
Residential real estate [Member]
Average recorded investment [Abstract]
Average recorded investment	993	523	833	580
Interest income recognized [Abstract]
Interest income recognized				27
Leases [Member]
Average recorded investment [Abstract]
Average recorded investment	75	168	112	105
Tax certificates [Member]
Average recorded investment [Abstract]
Average recorded investment	$ 1,134	$ 433	$ 918	$ 509