Securities - Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	$ 84,481	$ 55,293
Less Than 12 Months, Unrealized Losses	(3,110)	(460)
12 Months or Greater, Fair Value	30,922	35,524
12 Months or Greater, Unrealized Losses	(471)	(590)
Fair Value	115,403	90,817
Unrealized Losses	$ (3,581)	$ (1,050)
Number of debt securities with unrealized losses | security	152	110
Percentage of aggregate depreciation from amortized cost basis	3.00%	1.10%
Municipal Bonds
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	$ 19,372	$ 2,760
Less Than 12 Months, Unrealized Losses	(989)	(23)
12 Months or Greater, Fair Value	223	1,390
12 Months or Greater, Unrealized Losses	(7)	(13)
Fair Value	19,595	4,150
Unrealized Losses	(996)	(36)
Mortgage-Backed Securities
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	28,935	32,276
Less Than 12 Months, Unrealized Losses	(684)	(242)
12 Months or Greater, Fair Value	1,791	3,098
12 Months or Greater, Unrealized Losses	(27)	(39)
Fair Value	30,726	35,374
Unrealized Losses	(711)	(281)
Corporate Securities
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	10,298	8,350
Less Than 12 Months, Unrealized Losses	(160)	(131)
Fair Value	10,298	8,350
Unrealized Losses	(160)	(131)
SBA Securities
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	9,191	11,907
Less Than 12 Months, Unrealized Losses	(113)	(64)
12 Months or Greater, Fair Value	28,908	31,036
12 Months or Greater, Unrealized Losses	(437)	(538)
Fair Value	38,099	42,943
Unrealized Losses	(550)	$ (602)
Asset-Backed Securities
Fair value and gross unrealized losses of securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position
Less Than 12 Months, Fair Value	16,685
Less Than 12 Months, Unrealized Losses	(1,164)
Fair Value	16,685
Unrealized Losses	$ (1,164)