Income Tax - Deferred Taxes (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Deferred tax assets
Allowance for loan losses	$ 12,597	$ 13,928
Lease incentive	287	294
Impairment of available-for-sale securities	0	493
Loan fees	2,134	2,317
Net operating loss carryover	650	339
Accrued expenses	801	2,131
Deferred compensation	2,088	2,444
State tax credit	3,288	3,287
Other	420	81
Total deferred tax asset	22,265	25,314
Deferred tax liability
Fair market value adjustments - trust preferred securities	(346)	(348)
Net unrealized gain on securities available-for-sale	(7,327)	(5,339)
FHLB stock basis	(1,068)	(996)
Premises and equipment	(3,462)	(3,620)
Other	(1,148)	(1,229)
Total deferred tax liability	(13,351)	(11,532)
Net deferred tax asset	$ 8,914	$ 13,782