Investment Securities - Amortized cost to Estimated Fair Value (Details) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 segment	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($) segment	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 293,150		$ 293,150		$ 185,959
Unrealized Gains	0		0		661
Unrealized Losses	(23,530)		(23,530)		(2,165)
Fair Value	$ 269,620		$ 269,620		184,455
Number of securities sold \| segment	0	0	0	28
Proceeds from sale of securities available for sale			$ 0	$ 66,534
Realized gains on investment sales				694
Realized loss on investment sales				$ 541
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 232,406		232,406		132,452
Unrealized Gains	0		0		45
Unrealized Losses	(17,466)		(17,466)		(1,496)
Fair Value	214,940		214,940		131,001
Municipal
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,817		10,817		10,825
Unrealized Gains	0		0		43
Unrealized Losses	(2,730)		(2,730)		(394)
Fair Value	8,087		8,087		10,474
Corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,000		5,000		5,000
Unrealized Gains	0		0		0
Unrealized Losses	(352)		(352)		(66)
Fair Value	4,648		4,648		4,934
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,323		8,323		10,093
Unrealized Gains	0		0		59
Unrealized Losses	(101)		(101)		(12)
Fair Value	8,222		8,222		10,140
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	36,604		36,604		27,589
Unrealized Gains	0		0		514
Unrealized Losses	(2,881)		(2,881)		(197)
Fair Value	$ 33,723		$ 33,723		$ 27,906

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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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Amortized cost excluding accrued interest, after allowance for credit loss, of 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 excluding accrued interest, of 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 of realized gain 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 of cash inflow from sale of 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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