Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Noninterest Expense
Salaries and employee benefits	$ 14,203	$ 10,770
Occupancy and equipment	1,772	1,506
Professional fees	1,435	818
Data processing	976	679
Software subscriptions	889	589
Amortization of intangible assets	858	553
Insurance expense	518	436
Other	5,123	2,567
Total noninterest expense, excluding merger-related costs	25,774	17,918
Salaries and employee benefits merger-related costs	356
Other merger-related costs	2,068
Pre-tax acquisition costs	2,424
Total noninterest expense	$ 25,774	$ 17,918