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Fair Value Measurements and Financial Instruments - Schedule of Estimated Fair Values Based on Level 3 Inputs (Details) - Level 3 - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Financial royalty assets, net $ 19,047,183 $ 18,718,179
Carrying Value, net    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Financial royalty assets, net $ 14,332,596 $ 12,955,277