Income Taxes - Deferred Income Tax Asset (Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan losses	$ 6,941	$ 6,699
Accrued compensation	3,379	1,779
Stock compensation	769	660
Net unrealized losses charged to other comprehensive income on securities	2,070	347
Market discount on purchased loans	1,054	539
Foregone interest on nonaccrual loans	811	471
Net operating loss carryforward acquired from NCB	336	270
Other Real Estate Owned	754	0
Other deferred tax assets	364	763
Total deferred tax assets	16,478	11,528
Deferred tax liabilities:
Deferred loan fees, net	(3,333)	(2,518)
Premises and equipment	(1,819)	(1,091)
FHLB stock	(569)	(557)
Goodwill and other intangible assets	(3,526)	(304)
Federal tax credits	(1,457)	(1,107)
Junior subordinated debentures	(1,176)	(1,215)
Other deferred tax liabilities	(540)	(847)
Total deferred tax liabilities	(12,420)	(7,639)
Deferred tax asset, net	$ 4,058	$ 3,889