Securities - Schedule of Required Fair Value Disclosures for Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	$ 2,106		$ 1,839
Fair value at beginning of period, including equity securities acquired in business combination				$ 2,363
Unrealized Gains	16	$ 53	267
Unrealized Losses	491	20	0
Fair value at end of period	1,888	1,872
CRA Mutual Fund
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	1,045		1,012
Fair value at beginning of period, including equity securities acquired in business combination				1,045
Unrealized Gains	16	16	33
Unrealized Losses	0	0	0
Fair value at end of period	1,061	1,028
Stock in other banks
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	1,061		827
Fair value at beginning of period, including equity securities acquired in business combination				$ 1,318
Unrealized Gains	0	37	234
Unrealized Losses	491	20	$ 0
Fair value at end of period	$ 827	$ 844