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Derivatives - Carrying Value of Hedging Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Derivative [Line Items] |  |
Amortized Cost Basis | $ 550,288 | $ 11,059
Hedged Asset | 440,297 | 10,885
Basis Adjustment | 5,625 | (244)
Fixed rate mortgages |  |
Derivative [Line Items] |  |
Amortized Cost Basis | 491,018 | 0
Hedged Asset | 390,297 | 0
Basis Adjustment | 4,055 | 0
Fixed rate bonds |  |
Derivative [Line Items] |  |
Amortized Cost Basis | 59,270 | 11,059
Hedged Asset | 50,000 | 10,885
Basis Adjustment | $ 1,570 | $ (244)

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- Definition Amount of asset hedged in portfolio layer hedging relationship, expected to be remaining at end of hedging relationship. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4EEE -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4EEE + Details
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- Definition Amortized cost of closed portfolio of financial asset used to designate hedging relationship in which hedged item is expected to be outstanding for designated hedged period. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4EEE -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4EEE + Details
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