Investment Securities, Securities in Continuous Unrealized Loss Position (Details)	Jun. 30, 2020 USD ($) Security	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($) Security
Investment Securities, Qualitative Disclosure [Abstract]
Number of investment securities held | Security	534
Less than 12 months, number of positions | Security	25
12 months or more, number of positions | Security	72
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 56,939,000	$ 133,698,000	$ 161,357,000
12 months or more, fair value	4,508,000	5,911,000	41,997,000
Total, fair value	61,447,000	139,609,000	203,354,000
Less than 12 months, unrealized loss	27,000	94,000	26,000
12 months or more, unrealized loss	101,000	118,000	229,000
Total, unrealized loss	$ 128,000	212,000	$ 255,000
Number of HTM investments with gross unrealized losses | Security	0		0
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		355,000
12 months or more, fair value		0
Total, fair value		355,000
Less than 12 months, unrealized loss		12,000
12 months or more, unrealized loss		0
Total, unrealized loss		12,000
Obligations of States and Political Subdivisions [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value		355,000
12 months or more, fair value		0
Total, fair value		355,000
Less than 12 months, unrealized loss		12,000
12 months or more, unrealized loss		0
Total, unrealized loss	$ 0	12,000	$ 0
Less than 12 months, number of positions | Security	0
12 months or more, number of positions | Security	0
US Treasury Notes [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 49,996,000		159,966,000
12 months or more, fair value	0		0
Total, fair value	49,996,000		159,966,000
Less than 12 months, unrealized loss	1,000		25,000
12 months or more, unrealized loss	0		0
Total, unrealized loss	$ 1,000	0	25,000
Less than 12 months, number of positions | Security	1
12 months or more, number of positions | Security	0
US Government Agency SBA [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 4,396,000	2,693,000	60,000
12 months or more, fair value	4,293,000	5,198,000	6,750,000
Total, fair value	8,689,000	7,891,000	6,810,000
Less than 12 months, unrealized loss	14,000	6,000	0
12 months or more, unrealized loss	96,000	107,000	114,000
Total, unrealized loss	$ 110,000	113,000	114,000
Less than 12 months, number of positions | Security	22
12 months or more, number of positions | Security	53
Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0	131,005,000	1,331,000
12 months or more, fair value	215,000	713,000	35,247,000
Total, fair value	215,000	131,718,000	36,578,000
Less than 12 months, unrealized loss	0	88,000	1,000
12 months or more, unrealized loss	5,000	11,000	115,000
Total, unrealized loss	$ 5,000	99,000	116,000
Less than 12 months, number of positions | Security	1
12 months or more, number of positions | Security	19
Corporate Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 2,547,000
12 months or more, fair value	0
Total, fair value	2,547,000
Less than 12 months, unrealized loss	12,000
12 months or more, unrealized loss	0
Total, unrealized loss	$ 12,000
Less than 12 months, number of positions | Security	1
Government Agency & Government-Sponsored Entities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Total, unrealized loss	$ 0	$ 0	$ 0
Less than 12 months, number of positions | Security	0
12 months or more, number of positions | Security	0