Income Taxes - Components of deferred income taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Allowance for credit losses	$ 3,492	$ 4,170
Deferred compensation	5,102	3,832
Unrealized loss on available-for-sale investment securities	1,598	0
Net operating loss carryover from acquisition	206	521
Bank premises and equipment	264	862
Mark to market adjustment	154	184
Other deferred taxes	594	253
Other than temporary impairment	289	282
Loan and investment impairment	1,914	352
State Enterprise Zone credit carry-forward	981	783
State capital loss carry-forward	108	110
Alternative minimum tax credit	2,238	1,025
State taxes	32	20
Other	7	7
Partnership income	70	77
Total deferred tax assets	17,049	12,478
Valuation allowance	(108)	(110)
Net deferred tax asset after valuation allowance	16,941	12,368
Deferred tax liabilities:
Finance leases	(1,963)	(2,548)
Unrealized gain on available-for-sale investment securities	0	(5,305)
Core deposit intangible	(692)	(240)
FHLB stock	(319)	(241)
Loan origination costs	(406)	(256)
Total deferred tax liabilities	(3,380)	(8,590)
Net deferred tax assets	$ 13,561	$ 3,778