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Debt - Narrative (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended
Mar. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
shares
Mar. 31, 2024
USD ($)
facility
day
$ / shares
shares
Mar. 31, 2023
USD ($)
Oct. 04, 2021
USD ($)
Debt Instrument [Line Items]          
Gain on extinguishment of convertible debt     $ 59,194 $ 0  
Debt discounts issued     $ 17,300    
Common Stock          
Debt Instrument [Line Items]          
Extinguishment of convertible notes by issuance of common stock (in shares) | shares 72,621,879 9,490,000 72,621,879    
Line of Credit | Loan Warehouse Facilities          
Debt Instrument [Line Items]          
Number of facilities closed | facility     2    
Maximum available capacity of closed facilities $ 400,000   $ 400,000    
Number of new loans opened | facility     0    
Line of Credit | Risk retention warehouse facilities          
Debt Instrument [Line Items]          
Number of facilities closed | facility     1    
Convertible senior notes due 2026 | Convertible Debt          
Debt Instrument [Line Items]          
Face amount 512,000   $ 512,000   $ 1,200,000
Debt repurchased, face amount $ 600,000 $ 88,000 600,000    
Gain on extinguishment of convertible debt     $ 59,200    
Shares available for conversion (in shares) | shares 22,841,631   22,841,631    
Specified rate 0.00%   0.00%    
Convertible senior notes due 2029 | Convertible Debt          
Debt Instrument [Line Items]          
Face amount $ 862,500   $ 862,500    
Shares available for conversion (in shares) | shares 0   0    
Specified rate 1.25%   1.25%    
Net proceeds from offering     $ 845,300    
Purchasers' discount percentage 2.00%   2.00%    
Debt discounts issued     $ 17,300    
Deferred loan origination costs $ 4,600   $ 4,600    
Conversion price (in dollars per share) | $ / shares $ 9.45   $ 9.45    
Observation period | day     30    
Convertible debt, threshold, trading days preceding maturity date | day     30    
Conversion rate     0.1058089