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Investment Securities - Available-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 360,983	$ 427,128
Unrealized Gain	1,072	2,485
Unrealized Loss	(50,518)	(49,799)
Fair Value	311,537	379,814
United States government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	44,360	51,436
Unrealized Gain	8	15
Unrealized Loss	(7,228)	(6,637)
Fair Value	37,140	44,814
United States sponsored mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	73,911	68,267
Unrealized Gain	0	0
Unrealized Loss	(13,430)	(11,696)
Fair Value	60,481	56,571
United States treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	106,476	130,689
Unrealized Gain	0	48
Unrealized Loss	(8,376)	(9,828)
Fair Value	98,100	120,909
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	118,872	157,842
Unrealized Gain	1,064	2,412
Unrealized Loss	(21,312)	(21,618)
Fair Value	98,624	138,636
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,073	10,570
Unrealized Gain	0	10
Unrealized Loss	(172)	(20)
Fair Value	8,901	10,560
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,500	7,500
Unrealized Gain	0	0
Unrealized Loss	0	0
Fair Value	7,500	7,500
Total debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	360,192	426,304
Unrealized Gain	1,072	2,485
Unrealized Loss	(50,518)	(49,799)
Fair Value	310,746	378,990
Other securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	791	824
Unrealized Gain	0	0
Unrealized Loss	0	0
Fair Value	$ 791	$ 824

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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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