Investment Securities - Amortized cost and fair value of securities held-to-maturity and available-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Held-to-maturity
Amortized Cost	$ 100,598	$ 105,509
Gross Unrealized (Losses)	(18,833)	(2,251)
Held-to-maturity Securities	81,765	103,258
Available-for-sale
Amortized Cost	406,026	240,300
Gross Unrealized Gains		1,992
Gross Unrealized (Losses)	(39,480)	(2,992)
Available-for-sale Securities	366,546	239,300
U.S Treasuries
Held-to-maturity
Amortized Cost	6,000	6,000
Gross Unrealized (Losses)	(895)	(150)
Held-to-maturity Securities	5,105	5,850
Available-for-sale
Amortized Cost	63,404	30,954
Gross Unrealized (Losses)	(4,585)	(411)
Available-for-sale Securities	58,819	30,543
U.S. government and federal agencies
Held-to-maturity
Amortized Cost	35,588	35,720
Gross Unrealized (Losses)	(6,318)	(726)
Held-to-maturity Securities	29,270	34,994
Available-for-sale
Amortized Cost	38,717	34,803
Gross Unrealized Gains		258
Gross Unrealized (Losses)	(4,261)	(524)
Available-for-sale Securities	34,456	34,537
Collateralized mortgage obligations
Held-to-maturity
Amortized Cost	21,924	25,606
Gross Unrealized (Losses)	(4,155)	(534)
Held-to-maturity Securities	17,769	25,072
Available-for-sale
Amortized Cost	46,188	39,596
Gross Unrealized Gains		179
Gross Unrealized (Losses)	(5,977)	(726)
Available-for-sale Securities	40,211	39,049
Taxable municipal
Held-to-maturity
Amortized Cost	6,076	6,089
Gross Unrealized (Losses)	(1,340)	(194)
Held-to-maturity Securities	4,736	5,895
Available-for-sale
Amortized Cost	608	1,653
Gross Unrealized Gains		37
Gross Unrealized (Losses)	(30)	(5)
Available-for-sale Securities	578	1,685
Mortgage-backed
Held-to-maturity
Amortized Cost	31,010	32,094
Gross Unrealized (Losses)	(6,125)	(647)
Held-to-maturity Securities	24,885	31,447
Available-for-sale
Amortized Cost	249,113	127,287
Gross Unrealized Gains		1,232
Gross Unrealized (Losses)	(23,696)	(1,326)
Available-for-sale Securities	225,417	127,193
Corporate bonds
Available-for-sale
Amortized Cost	3,000	1,000
Gross Unrealized Gains		31
Gross Unrealized (Losses)	(308)
Available-for-sale Securities	2,692	1,031
Tax-exempt municipal
Available-for-sale
Amortized Cost	4,996	5,007
Gross Unrealized Gains		255
Gross Unrealized (Losses)	(623)
Available-for-sale Securities	$ 4,373	$ 5,262

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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