Investment Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Securities Available for Sale:
Amortized cost	$ 326,418	$ 346,874
Gross Unrealized Gains	8,078	2,716
Gross Unrealized Losses	(1,411)	(2,258)
Investment securities available for sale, at fair value	333,085	347,332
State, county & municipal securities
Securities Available for Sale:
Amortized cost	6,296	5,133
Gross Unrealized Gains	135	36
Gross Unrealized Losses	(21)	(54)
Investment securities available for sale, at fair value	6,410	5,115
Corporate Debt securities
Securities Available for Sale:
Amortized cost	2,007	2,811
Gross Unrealized Gains	10	11
Gross Unrealized Losses	0	(16)
Investment securities available for sale, at fair value	2,017	2,806
Mortgage-backed securities
Securities Available for Sale:
Amortized cost	318,115	338,930
Gross Unrealized Gains	7,933	2,669
Gross Unrealized Losses	(1,390)	(2,188)
Investment securities available for sale, at fair value	$ 324,658	$ 339,411

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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