Debt Securities Held to Maturity - Continuous Unrealized Loss Position of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Less Than 12 Months
Fair Value	$ 0	$ 280,063
Gross Unrealized (Losses)	0	(33,044)
12 Months or Longer
Fair Value	357,177	90,328
Gross Unrealized (Losses)	(43,977)	(18,088)
Total
Fair Value	357,177	370,391
Gross Unrealized (Losses)	(43,977)	(51,132)
U.S. government and agency obligations
Less Than 12 Months
Fair Value	0	4,956
Gross Unrealized (Losses)	0	(44)
12 Months or Longer
Fair Value	43,969	37,611
Gross Unrealized (Losses)	(5,902)	(7,260)
Total
Fair Value	43,969	42,567
Gross Unrealized (Losses)	(5,902)	(7,304)
Mortgage-backed securities and collateralized mortgage obligations
Less Than 12 Months
Fair Value	0	275,107
Gross Unrealized (Losses)	0	(33,000)
12 Months or Longer
Fair Value	313,208	52,717
Gross Unrealized (Losses)	(38,075)	(10,828)
Total
Fair Value	313,208	327,824
Gross Unrealized (Losses)	$ (38,075)	$ (43,828)

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.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-7

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-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

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- Definition

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

+ References

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-Topic 320
-SubTopic 10
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-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

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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.

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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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