Investment Securities - Securities in a Gross Unrealized Loss Position - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	$ 73,474	$ 217,505
Fair Value, 12 Months or Longer	251,797	140,071
Fair Value	325,271	357,576
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(3,892)	(13,763)
Gross Unrealized Losses, 12 Months or Longer	(32,526)	(22,874)
Gross Unrealized Losses	(36,418)	(36,637)
U.S Treasuries
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	2,848	31,261
Fair Value, 12 Months or Longer	47,308	27,949
Fair Value	50,156	59,210
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(105)	(1,194)
Gross Unrealized Losses, 12 Months or Longer	(3,666)	(3,076)
Gross Unrealized Losses	(3,771)	(4,270)
U.S. government and federal agencies
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	2,831	16,107
Fair Value, 12 Months or Longer	32,180	18,653
Fair Value	35,011	34,760
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(97)	(1,078)
Gross Unrealized Losses, 12 Months or Longer	(3,704)	(2,910)
Gross Unrealized Losses	(3,801)	(3,988)
Corporate bonds
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months		2,614
Fair Value, 12 Months or Longer	2,445
Fair Value	2,445	2,614
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months		(386)
Gross Unrealized Losses, 12 Months or Longer	(555)
Gross Unrealized Losses	(555)	(386)
Collateralized mortgage obligations
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	3,366	16,746
Fair Value, 12 Months or Longer	32,872	21,728
Fair Value	36,238	38,474
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(123)	(1,143)
Gross Unrealized Losses, 12 Months or Longer	(6,785)	(5,115)
Gross Unrealized Losses	(6,908)	(6,258)
Tax-exempt municipal
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months		4,645
Fair Value, 12 Months or Longer	2,628
Fair Value	2,628	4,645
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months		(348)
Gross Unrealized Losses, 12 Months or Longer	(305)
Gross Unrealized Losses	(305)	(348)
Taxable municipal
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	332	337
Fair Value, 12 Months or Longer	245	242
Fair Value	577	579
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(5)	(2)
Gross Unrealized Losses, 12 Months or Longer	(25)	(27)
Gross Unrealized Losses	(30)	(29)
Mortgage-backed
Available-for-Sale, Fair Value
Fair Value, Less than 12 Months	64,097	145,795
Fair Value, 12 Months or Longer	134,119	71,499
Fair Value	198,216	217,294
Gross Unrealized Losses
Gross Unrealized Losses, Less than 12 Months	(3,562)	(9,612)
Gross Unrealized Losses, 12 Months or Longer	(17,486)	(11,746)
Gross Unrealized Losses	$ (21,048)	$ (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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