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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Borrowings	$ 1,546,934	$ 1,650,576
Notional Amount	2,116,501	6,861,921
Interest rate contract
Debt Instrument [Line Items]
Notional Amount	37,000	$ 2,100,000
Repo or Warehouse Debt
Debt Instrument [Line Items]
Borrowings	689,000
Bridge Loan
Debt Instrument [Line Items]
Borrowings	757,000
Trust Preferred Securities and Subordinated Notes
Debt Instrument [Line Items]
Borrowings	$ 140,000

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-Name Accounting Standards Codification
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