Securities, Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Securities [Abstract]
Percentage of total investment with unrealized losses	31.30%	42.80%
Available-for-sale, amortized cost [Abstract]
Less than 12 months	$ 112,417	$ 85,046
12 months or more	90,675	173,948
Total	203,092	258,994
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(3,895)	(561)
12 months or more	(975)	(1,400)
Total	(4,870)	(1,961)
Available-for-sale, fair value [Abstract]
Less than 12 months	108,522	84,485
12 months or more	89,700	172,548
Total	198,222	257,033
U.S. Treasury and Government Agencies [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	14,713	25,955
12 months or more	51,913	82,339
Total	66,626	108,294
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(86)	(148)
12 months or more	(251)	(428)
Total	(337)	(576)
Available-for-sale, fair value [Abstract]
Less than 12 months	14,627	25,807
12 months or more	51,662	81,911
Total	66,289	107,718
State and Political Subdivisions [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	1,113	8,356
12 months or more	0	0
Total	1,113	8,356
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(43)	(37)
12 months or more	0	0
Total	(43)	(37)
Available-for-sale, fair value [Abstract]
Less than 12 months	1,070	8,319
12 months or more	0	0
Total	1,070	8,319
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	40,026	19,317
12 months or more	38,762	91,609
Total	78,788	110,926
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(570)	(100)
12 months or more	(724)	(972)
Total	(1,294)	(1,072)
Available-for-sale, fair value [Abstract]
Less than 12 months	39,456	19,217
12 months or more	38,038	90,637
Total	77,494	109,854
Other Debt Securities [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	56,565	31,418
12 months or more	0	0
Total	56,565	31,418
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(3,196)	(276)
12 months or more	0	0
Total	(3,196)	(276)
Available-for-sale, fair value [Abstract]
Less than 12 months	53,369	31,142
12 months or more	0	0
Total	$ 53,369	$ 31,142