Investment Securities - Securities Temporarily Impaired (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	$ 99,070	$ 77,148
Less than 12 months, Unrealized Losses	(1,062)	(588)
12 months or more, Fair Value	3,878	19,000
12 months or more, Unrealized Losses	(88)	(498)
Fair Value	102,948	96,148
Unrealized Losses	(1,150)	(1,086)
U.S. government-sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	30,212	12,372
Less than 12 months, Unrealized Losses	(333)	(128)
12 months or more, Fair Value	0	0
12 months or more, Unrealized Losses	0	0
Fair Value	30,212	12,372
Unrealized Losses	(333)	(128)
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	65,505	54,244
Less than 12 months, Unrealized Losses	(724)	(359)
12 months or more, Fair Value	3,878	18,696
12 months or more, Unrealized Losses	(88)	(490)
Fair Value	69,383	72,940
Unrealized Losses	(812)	(849)
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	855	10,532
Less than 12 months, Unrealized Losses	(3)	(101)
12 months or more, Fair Value	0	304
12 months or more, Unrealized Losses	0	(8)
Fair Value	855	10,836
Unrealized Losses	(3)	$ (109)
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	2,498
Less than 12 months, Unrealized Losses	(2)
12 months or more, Fair Value	0
12 months or more, Unrealized Losses	0
Fair Value	2,498
Unrealized Losses	$ (2)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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