Investment Securities - Securities in a Gross Unrealized Loss Position - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	$ 113,889	$ 217,505
Fair Value, 12 Months or Longer	226,270	140,071
Fair Value	340,159	357,576
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(4,408)	(13,763)
Gross Unrealized Losses, 12 Months or Longer	(27,760)	(22,874)
Gross Unrealized Losses	(32,168)	(36,637)
U.S Treasuries
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	12,612	31,261
Fair Value, 12 Months or Longer	37,956	27,949
Fair Value	50,568	59,210
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(294)	(1,194)
Gross Unrealized Losses, 12 Months or Longer	(3,032)	(3,076)
Gross Unrealized Losses	(3,326)	(4,270)
U.S. government and federal agencies
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	5,757	16,107
Fair Value, 12 Months or Longer	29,526	18,653
Fair Value	35,283	34,760
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(160)	(1,078)
Gross Unrealized Losses, 12 Months or Longer	(3,337)	(2,910)
Gross Unrealized Losses	(3,497)	(3,988)
Corporate bonds
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	930	2,614
Fair Value, 12 Months or Longer	1,709
Fair Value	2,639	2,614
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(70)	(386)
Gross Unrealized Losses, 12 Months or Longer	(291)
Gross Unrealized Losses	(361)	(386)
Collateralized mortgage obligations
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	9,308	16,746
Fair Value, 12 Months or Longer	28,680	21,728
Fair Value	37,988	38,474
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(282)	(1,143)
Gross Unrealized Losses, 12 Months or Longer	(5,766)	(5,115)
Gross Unrealized Losses	(6,048)	(6,258)
Tax-exempt municipal
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months		4,645
Fair Value, 12 Months or Longer	2,666
Fair Value	2,666	4,645
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months		(348)
Gross Unrealized Losses, 12 Months or Longer	(268)
Gross Unrealized Losses	(268)	(348)
Taxable municipal
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	335	337
Fair Value, 12 Months or Longer	247	242
Fair Value	582	579
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(2)	(2)
Gross Unrealized Losses, 12 Months or Longer	(23)	(27)
Gross Unrealized Losses	(25)	(29)
Mortgage-backed
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	84,947	145,795
Fair Value, 12 Months or Longer	125,486	71,499
Fair Value	210,433	217,294
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(3,600)	(9,612)
Gross Unrealized Losses, 12 Months or Longer	(15,043)	(11,746)
Gross Unrealized Losses	$ (18,643)	$ (21,358)

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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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Amount of accumulated unrealized loss on 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 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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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 less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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