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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Federal corporate income tax rate	21.00%	21.00%	35.00%
Incremental income tax expense for remeasurement of deferred tax asset			$ 6,640
Deferred tax asset
Allowance for loan losses and OREO losses	$ 8,227	$ 8,567
Nonqualified defined contribution plan	1,053	1,643
Fair value adjustments related to acquisition	3,247	2,925
Share-based compensation	863	825
Lease liabilities	667
Reserve for indemnification losses	645	663
Interest on nonaccrual loans	226	346
Cash flow hedges	24
Net unrealized loss on securities available for sale		365
Other	1,559	1,415
Deferred tax asset	16,511	16,749
Deferred tax liability
Goodwill and other intangible assets	(2,818)	(2,838)
Depreciation	(972)	(1,024)
Right of use assets	(664)
Defined benefit plan	(423)	(620)
Net unrealized gain on securities available for sale	(415)
Cash flow hedges		(74)
Deferred tax liability	(5,292)	(4,556)
Net deferred tax asset	$ 11,219	$ 12,193

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