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Derivative Instruments - Non-hedge Derivatives (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Derivative [Line Items]
Loss protection fee		7.95%		7.95%
Credit Default Swap | Consumer real estate – mortgage
Derivative [Line Items]
Notional Amount		$ 1,700,000		$ 1,700,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount		4,569,490		4,569,490		$ 4,075,480
Estimated Fair Value (1)	[1]	(930)		(930)		(744)
Derivative, Gain (Loss) on Derivative, Net		(13)	$ (519)	(191)	$ (582)
Not Designated as Hedging Instrument | Assets
Derivative [Line Items]
Notional Amount		2,284,745		2,284,745		2,037,740
Estimated Fair Value (1)	[1]	80,907		80,907		66,462
Not Designated as Hedging Instrument | Liabilities
Derivative [Line Items]
Notional Amount		2,284,745		2,284,745		2,037,740
Estimated Fair Value (1)	[1]	(81,837)		(81,837)		$ (67,206)
Not Designated as Hedging Instrument | Credit Default Swap
Derivative [Line Items]
Notional Amount		86,500		86,500
Not Designated as Hedging Instrument | Credit Default Swap, Buying Protection
Derivative [Line Items]
Notional Amount		$ 86,500		$ 86,500
[1] The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At June 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

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
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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- Definition

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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