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Derivative Instruments - Non-hedge Derivatives (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Jun. 28, 2024	Dec. 31, 2023
Derivative [Line Items]
Loss protection fee		7.95%		7.95%
Credit Default Swap, Buying Protection
Derivative [Line Items]
Notional Amount		$ 86,500		$ 86,500
Credit Default Swap | Consumer real estate – mortgage
Derivative [Line Items]
Notional Amount						$ 1,700,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount		4,716,752		4,716,752			$ 4,075,480
Estimated Fair Value (1)	[1]	(515)		(515)			(744)
Derivative, Gain (Loss) on Derivative, Net		414	$ (265)	223	$ (847)
Not Designated as Hedging Instrument | Assets
Derivative [Line Items]
Notional Amount		2,358,376		2,358,376			2,037,740
Estimated Fair Value (1)	[1]	43,972		43,972			66,462
Not Designated as Hedging Instrument | Liabilities
Derivative [Line Items]
Notional Amount		2,358,376		2,358,376			2,037,740
Estimated Fair Value (1)	[1]	(44,487)		(44,487)			(67,206)
Not Designated as Hedging Instrument | Credit Default Swap
Derivative [Line Items]
Notional Amount		83,558		83,558		$ 86,500	0
Derivative, Gain (Loss) on Derivative, Net		(137)	$ 0	(137)	$ 0
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		$ (137)		$ (137)			$ 0
[1] The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At September 30, 2024 and December 31, 2023, there were no interest rate swap agreements designated as non-hedge derivatives cleared through clearing houses.

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- Definition

Loss protection fee

+ References

No definition available.

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X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Paragraph 1A
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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