Guarantees and Commitments - Schedule of Long-Term Standby Purchase Commitments (Details) - Long-Term Standby Purchase Commitments - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Guarantor Obligations [Line Items]
Maximum principal amount	$ 3,613,934	$ 3,423,155
Weighted-average remaining maturity	14 years 8 months 12 days	15 years 3 months 18 days
Guarantee and commitment obligation
Guarantor Obligations [Line Items]
Guarantee and commitment obligation	$ 41,554	$ 40,121