Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Available-for-sale Securities [Abstract]
Amortized cost	$ 528,052	$ 546,640
Gross Unrealized Gains	11,186	3,426
Gross Unrealized Losses	(10,927)	(9,214)
Fair Value	528,311	540,852
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-maturity securities, amortized cost	68,254	61,878
Held-to-maturity securities, Gross Unrealized Gains	1,297	814
Held-to-maturity securities, Gross Unrealized Losses	(375)	(132)
Held-to-maturity, at fair value	69,176	62,560
U.S. Government-sponsored agencies
Available-for-sale Securities [Abstract]
Amortized cost	65,007	77,715
Gross Unrealized Gains	489	99
Gross Unrealized Losses	(1,814)	(1,942)
Fair Value	63,682	75,872
Municipal securities
Available-for-sale Securities [Abstract]
Amortized cost	87,365	97,447
Gross Unrealized Gains	3,296	1,706
Gross Unrealized Losses	(4,240)	(1,501)
Fair Value	86,421	97,652
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-maturity securities, amortized cost	14,582	10,142
Held-to-maturity securities, Gross Unrealized Gains	746	226
Held-to-maturity securities, Gross Unrealized Losses	0	0
Held-to-maturity, at fair value	15,328	10,368
Agency mortgage-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	250,755	264,142
Gross Unrealized Gains	5,773	1,304
Gross Unrealized Losses	(3,236)	(4,006)
Fair Value	253,292	261,440
Private label mortgage-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	71,519	63,704
Gross Unrealized Gains	1,128	97
Gross Unrealized Losses	(21)	(188)
Fair Value	72,626	63,613
Asset-backed securities
Available-for-sale Securities [Abstract]
Amortized cost	5,000	5,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(79)	(45)
Fair Value	4,921	4,955
Corporate securities
Available-for-sale Securities [Abstract]
Amortized cost	48,406	38,632
Gross Unrealized Gains	500	220
Gross Unrealized Losses	(1,537)	(1,532)
Fair Value	47,369	37,320
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Held-to-maturity securities, amortized cost	53,672	51,736
Held-to-maturity securities, Gross Unrealized Gains	551	588
Held-to-maturity securities, Gross Unrealized Losses	(375)	(132)
Held-to-maturity, at fair value	$ 53,848	$ 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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