Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Available-for-sale Securities [Abstract]
Amortized cost	$ 608,567	$ 546,640
Gross Unrealized Gains	12,523	3,426
Gross Unrealized Losses	(12,408)	(9,214)
Fair Value	608,682	540,852
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-maturity securities, amortized cost	66,331	61,878
Held-to-maturity securities, Gross Unrealized Gains	3,323	814
Held-to-maturity securities, Gross Unrealized Losses	(186)	(132)
Held-to-maturity, at fair value	69,468	62,560
U.S. Government-sponsored agencies
Available-for-sale Securities [Abstract]
Amortized cost	71,387	77,715
Gross Unrealized Gains	438	99
Gross Unrealized Losses	(1,821)	(1,942)
Fair Value	70,004	75,872
Municipal securities
Available-for-sale Securities [Abstract]
Amortized cost	94,981	97,447
Gross Unrealized Gains	4,049	1,706
Gross Unrealized Losses	(4,211)	(1,501)
Fair Value	94,819	97,652
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-maturity securities, amortized cost	14,617	10,142
Held-to-maturity securities, Gross Unrealized Gains	1,061	226
Held-to-maturity securities, Gross Unrealized Losses	0	0
Held-to-maturity, at fair value	15,678	10,368
Agency mortgage-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	279,458	264,142
Gross Unrealized Gains	6,901	1,304
Gross Unrealized Losses	(3,727)	(4,006)
Fair Value	282,632	261,440
Private label mortgage-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	114,363	63,704
Gross Unrealized Gains	813	97
Gross Unrealized Losses	(152)	(188)
Fair Value	115,024	63,613
Asset-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	5,000	5,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(287)	(45)
Fair Value	4,713	4,955
Corporate securities
Available-for-sale Securities [Abstract]
Amortized cost	43,378	38,632
Gross Unrealized Gains	322	220
Gross Unrealized Losses	(2,210)	(1,532)
Fair Value	41,490	37,320
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-maturity securities, amortized cost	51,714	51,736
Held-to-maturity securities, Gross Unrealized Gains	2,262	588
Held-to-maturity securities, Gross Unrealized Losses	(186)	(132)
Held-to-maturity, at fair value	$ 53,790	$ 52,192

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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