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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
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]      
Beginning balance $ (1,263,824) $ (868,418) $ (1,982,897)
Increases to the cumulative allowance for changes in expected cash flows from financial royalty assets (912,710) (645,612) (322,717)
Decreases to the cumulative allowance for changes in expected cash flows from financial royalty assets 446,955 570,959 1,342,038
Write-off of cumulative allowance 21,721 2,964 95,158
Write off of credit loss allowance   25,174  
Current period provision for credit losses, net 12,913 (156,186)  
Ending balance $ (1,694,945) (1,263,824) (868,418)
Writeoff related to financial royalty asset   90,200  
Cumulative Effect, Period of Adoption, Adjustment      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Beginning balance   $ (192,705)  
Ending balance     $ (192,705)