Securities - Schedule of Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 459,643	$ 335,603
Gross Unrealized Gains	8,457	1,453
Gross Unrealized Losses	(356)	(1,483)
Fair Value	467,744	335,573
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	278,786	236,572
Gross Unrealized Gains	3,995	299
Gross Unrealized Losses	(268)	(1,200)
Fair Value	282,513	235,671
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	169,954	91,929
Gross Unrealized Gains	4,252	1,108
Gross Unrealized Losses	(82)	(279)
Fair Value	174,124	92,758
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,903	7,102
Gross Unrealized Gains	210	46
Gross Unrealized Losses	(6)	(4)
Fair Value	$ 11,107	$ 7,144

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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