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Cumulative Allowance and the Provision for Changes in Expected Cash Flows from Financial Royalty Assets - Schedule of Cumulative Allowance for Changes in Expected Cash Flows (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance $ (1,694,945)  
Increases to the cumulative allowance for changes in expected cash flows from financial royalty assets (556,020)  
Decreases to the cumulative allowance for changes in expected cash flows from financial royalty assets 202,726  
Current period provision for credit losses, net 62,959  
Ending balance (1,985,280)  
Cumulative allowance for credit losses $ 247,845 $ 310,804