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Securities Available-for-Sale (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Securities available-for-sale
Securities, Amortized Cost	$ 453,668	$ 477,326
Securities, Gross Unrealized Gains	6,922	11,015
Securities, Gross Unrealized Losses	(1,657)	(386)
Securities available-for-sale	458,933	487,955
Securities, Allowance for Investment Credit Losses
Federal agency obligations [Member]
Securities available-for-sale
Securities, Amortized Cost	34,649	37,015
Securities, Gross Unrealized Gains	1,197	1,508
Securities, Gross Unrealized Losses	(73)	(65)
Securities available-for-sale	35,773	38,458
Securities, Allowance for Investment Credit Losses
Residential mortgage pass-through securities [Member]
Securities available-for-sale
Securities, Amortized Cost	261,761	266,114
Securities, Gross Unrealized Gains	2,655	4,811
Securities, Gross Unrealized Losses	(1,258)	(41)
Securities available-for-sale	263,158	270,884
Securities, Allowance for Investment Credit Losses
Commercial mortgage pass-through securities [Member]
Securities available-for-sale
Securities, Amortized Cost	8,886	6,906
Securities, Gross Unrealized Gains	202	203
Securities, Gross Unrealized Losses	(293)	(187)
Securities available-for-sale	8,795	6,922
Securities, Allowance for Investment Credit Losses
Obligations of U.S. states and political subdivisions [Member]
Securities available-for-sale
Securities, Amortized Cost	133,722	138,539
Securities, Gross Unrealized Gains	2,695	4,269
Securities, Gross Unrealized Losses	(29)
Securities available-for-sale	136,388	142,808
Securities, Allowance for Investment Credit Losses
Corporate bonds and notes [Member]
Securities available-for-sale
Securities, Amortized Cost	11,459	24,925
Securities, Gross Unrealized Gains	162	222
Securities, Gross Unrealized Losses		(52)
Securities available-for-sale	11,621	25,095
Securities, Allowance for Investment Credit Losses
Asset-backed securities [Member]
Securities available-for-sale
Securities, Amortized Cost	2,874	3,521
Securities, Gross Unrealized Gains	10
Securities, Gross Unrealized Losses	(4)	(41)
Securities available-for-sale	2,880	3,480
Securities, Allowance for Investment Credit Losses
Certificates of deposit [Member]
Securities available-for-sale
Securities, Amortized Cost	150	149
Securities, Gross Unrealized Gains	1	2
Securities, Gross Unrealized Losses
Securities available-for-sale	151	151
Securities, Allowance for Investment Credit Losses
Other securities [Member]
Securities available-for-sale
Securities, Amortized Cost	167	157
Securities, Gross Unrealized Gains
Securities, Gross Unrealized Losses
Securities available-for-sale	167	$ 157
Securities, Allowance for Investment Credit Losses

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- Definition

Securities, Allowance for Investment Credit Losses.

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Available for sale securities gross unrealized gain accumulated in investments.

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Available for sale securities gross unrealized loss accumulated in investments.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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