Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	$ 477,326	$ 401,048
Investment Securities Available-for-Sale, Gross Unrealized Gains	11,015	4,875
Investment Securities Available-for-Sale, Gross Unrealized Losses	(386)	(1,222)
Investment Securities Available-for-Sale, Fair Value	487,955	404,701
Federal Agency Obligations [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	37,015	27,667
Investment Securities Available-for-Sale, Gross Unrealized Gains	1,508	612
Investment Securities Available-for-Sale, Gross Unrealized Losses	(65)	(42)
Investment Securities Available-for-Sale, Fair Value	38,458	28,237
Residential mortgage pass-through securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	266,114	199,611
Investment Securities Available-for-Sale, Gross Unrealized Gains	4,811	1,528
Investment Securities Available-for-Sale, Gross Unrealized Losses	(41)	(643)
Investment Securities Available-for-Sale, Fair Value	270,884	200,496
Commercial mortgage pass-through securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	6,906	4,995
Investment Securities Available-for-Sale, Gross Unrealized Gains	203	37
Investment Securities Available-for-Sale, Gross Unrealized Losses	(187)	(35)
Investment Securities Available-for-Sale, Fair Value	6,922	4,997
Obligations of U.S. states and political subdivisions [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	138,539	134,500
Investment Securities Available-for-Sale, Gross Unrealized Gains	4,269	2,411
Investment Securities Available-for-Sale, Gross Unrealized Losses		(392)
Investment Securities Available-for-Sale, Fair Value	142,808	136,519
Corporate Bonds and Notes [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	24,925	28,142
Investment Securities Available-for-Sale, Gross Unrealized Gains	222	285
Investment Securities Available-for-Sale, Gross Unrealized Losses	(52)	(45)
Investment Securities Available-for-Sale, Fair Value	25,095	28,382
Asset-backed Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	3,521	5,845
Investment Securities Available-for-Sale, Gross Unrealized Gains
Investment Securities Available-for-Sale, Gross Unrealized Losses	(41)	(65)
Investment Securities Available-for-Sale, Fair Value	3,480	5,780
Certificates of Deposit [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	149	148
Investment Securities Available-for-Sale, Gross Unrealized Gains	2	2
Investment Securities Available-for-Sale, Gross Unrealized Losses
Investment Securities Available-for-Sale, Fair Value	151	150
Other Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	157	140
Investment Securities Available-for-Sale, Gross Unrealized Gains
Investment Securities Available-for-Sale, Gross Unrealized Losses
Investment Securities Available-for-Sale, Fair Value	$ 157	$ 140