Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax asset
Allowance for loan losses and OREO losses	$ 14,035	$ 13,445
Fair value adjustments related to acquisition	3,953	4,888
Reserve for indemnification losses	875	898
Deferred compensation	2,005	1,940
Share-based compensation	1,036	918
Interest on nonaccrual loans	1,088	997
Cash flow hedges	22	68
Other	3,722	3,411
Deferred tax asset	26,736	26,565
Deferred tax liability
Goodwill and other intangible assets	(3,848)	(3,569)
Core deposit intangible	(307)	(566)
Defined benefit plan	(116)	(63)
Depreciation	(180)	(125)
Net unrealized gain on securities available for sale	(746)	(1,880)
Deferred tax liability	(5,197)	(6,203)
Net deferred tax asset	$ 21,539	$ 20,362