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Derivative Instruments - Non-hedge Derivatives (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Derivative [Line Items] |  |  |  |  |  |
Notional Amount |  | $ 3,766,486 |  | $ 3,766,486 |  | $ 3,241,040
Estimated Fair Value (1) | [1] | (1,328) |  | (1,328) |  | (56,720)
Derivative, Gain (Loss) on Derivative, Net |  | (519) | $ (40) | (582) | $ 241 |
Assets |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional Amount |  | 1,883,243 |  | 1,883,243 |  | 1,620,520
Estimated Fair Value (1) | [1] | 95,102 |  | 95,102 |  | 39,763
Liabilities |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional Amount |  | 1,883,243 |  | 1,883,243 |  | 1,620,520
Estimated Fair Value (1) | [1] | $ (96,430) |  | $ (96,430) |  | $ (96,483)
[1] | The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At June 30, 2023 and December 31, 2022, the notional amount of interest rate swap agreements designated as non-hedge derivatives cleared through clearing houses was $68.3 million and $827.3 million with a fair value that approximates zero due to $329,000 and $56.3 million in received variation margin payments.

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- 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 + Details
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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 + Details
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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 + Details
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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. + References No definition available. + Details
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