Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value
Less Than 12 Months	$ 44,327	$ 280,063
12 Months or Longer	327,860	90,328
Total	372,187	370,391
Gross Unrealized (Losses)
Less Than 12 Months	(2,405)	(33,044)
12 Months or Longer	(42,635)	(18,088)
Total	(45,040)	(51,132)
U.S. government and agency obligations
Fair Value
Less Than 12 Months	4,935	4,956
12 Months or Longer	38,337	37,611
Total	43,272	42,567
Gross Unrealized (Losses)
Less Than 12 Months	(65)	(44)
12 Months or Longer	(6,534)	(7,260)
Total	(6,599)	(7,304)
Mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	39,392	275,107
12 Months or Longer	289,523	52,717
Total	328,915	327,824
Gross Unrealized (Losses)
Less Than 12 Months	(2,340)	(33,000)
12 Months or Longer	(36,101)	(10,828)
Total	$ (38,441)	$ (43,828)

Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position.

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

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563

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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for less than 12 months.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer.

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