Securities - Summary Comparison of Securities by Type (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Available for sale:
Total available for sale securities	$ 437,661	$ 337,184
Gross Unrealized Gains	14,572	3,352
Gross Unrealized Losses	(1,695)	(599)
Securities, available for sale	450,538	339,937
Held to maturity:
Amortized Cost	0	86,579
Gross Unrealized Gains	0	382
Gross Unrealized Losses	0	(144)
Fair Value	0	86,817
U.S. Treasuries
Available for sale:
Total available for sale securities	47,700	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Securities, available for sale	47,700	0
U.S. Government Agencies
Available for sale:
Total available for sale securities	45	16,380
Gross Unrealized Gains	0	15
Gross Unrealized Losses	0	(2)
Securities, available for sale	45	16,393
Held to maturity:
Amortized Cost	0	18,175
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(32)
Fair Value	0	18,143
Corporate debt securities
Available for sale:
Total available for sale securities	196,750	94,561
Gross Unrealized Gains	8,131	1,110
Gross Unrealized Losses	(1,685)	(302)
Securities, available for sale	203,196	95,369
Municipal bonds
Available for sale:
Total available for sale securities	31,762	30,297
Gross Unrealized Gains	1,860	1,870
Gross Unrealized Losses	0	(14)
Securities, available for sale	33,622	32,153
Held to maturity:
Amortized Cost	0	5,107
Gross Unrealized Gains	0	182
Gross Unrealized Losses	0	0
Fair Value	0	5,289
Collateralized mortgage obligations
Available for sale:
Total available for sale securities	6,508	16,400
Gross Unrealized Gains	146	40
Gross Unrealized Losses	(7)	(43)
Securities, available for sale	6,647	16,397
Mortgage-backed securities
Available for sale:
Total available for sale securities	154,896	179,546
Gross Unrealized Gains	4,435	317
Gross Unrealized Losses	(3)	(238)
Securities, available for sale	159,328	179,625
Held to maturity:
Amortized Cost	0	63,297
Gross Unrealized Gains	0	200
Gross Unrealized Losses	0	(112)
Fair Value	$ 0	$ 63,385

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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