Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total assets	$ 7,689,631	$ 7,665,293	$ 7,360,171
Liabilities	6,115,616	6,274,686
Related Party
Variable Interest Entity [Line Items]
Obligations payable	66,300	37,000
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total assets	246,400	232,100
Liabilities	84,300	78,800
Variable Interest Entity, Primary Beneficiary | Related Party
Variable Interest Entity [Line Items]
Obligations payable	$ 161,800	$ 158,300