Securities - Securities Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost	$ 300,837	$ 283,216
Gross Unrealized Gains	10,061	7,711
Gross Unrealized Losses	(3,581)	(1,050)
Fair Value	307,317	289,877
U.S. Treasury Securities
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost		4,990
Gross Unrealized Gains		8
Fair Value		4,998
Municipal Bonds
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost	115,331	99,441
Gross Unrealized Gains	7,897	6,338
Gross Unrealized Losses	(996)	(36)
Fair Value	122,232	105,743
Mortgage-Backed Securities
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost	62,405	64,312
Gross Unrealized Gains	1,099	697
Gross Unrealized Losses	(711)	(281)
Fair Value	62,793	64,728
Corporate Securities
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost	49,079	49,674
Gross Unrealized Gains	1,021	633
Gross Unrealized Losses	(160)	(131)
Fair Value	49,940	50,176
SBA Securities
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost	47,107	50,126
Gross Unrealized Gains	35	35
Gross Unrealized Losses	(550)	(602)
Fair Value	46,592	49,559
Asset-Backed Securities
The amortized cost and estimated fair value of securities with gross unrealized gains and losses
Amortized Cost	26,915	14,673
Gross Unrealized Gains	9
Gross Unrealized Losses	(1,164)
Fair Value	$ 25,760	$ 14,673