Revenue Recognition - Non-interest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Non-interest income
Returned item and overdraft fees	$ 1,663	$ 1,567
Other service charges on deposits	1,520	1,376
Debit card interchange income	1,632	1,512
Loss on limited partnerships	(158)	(450)
Dividends on equity investments	194	231
Unrealized gains recognized on equity investments	447
Net gains on sale of securities		6
Other	808	1,664
Total non-interest income	6,106	5,906
Non-interest expense
Salaries and employee benefits	10,172	9,243
Occupancy expense	2,327	2,361
Gain on sale of foreclosed assets	2	(16)
Gain on sale of OREO	2	3
Other	5,317	6,245
Total non-interest expense	$ 17,818	$ 17,852