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Cumulative Allowance and the Provision for Changes in Expected Cash Flows from Financial Royalty Assets - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]        
Cumulative adjustment to retained earnings $ (10,248,545) $ (9,895,815) $ (6,141,438) $ (4,552,079)
Retained Earnings        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Cumulative adjustment to retained earnings $ (2,255,179) $ (1,920,635) (2,825,212) $ (1,215,953)
Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Cumulative adjustment to retained earnings     192,705  
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Cumulative adjustment to retained earnings     $ 192,705