Cumulative Allowance and the Provision for Changes in Expected Cash Flows from Financial Royalty Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (3,065,145)
Increases to the cumulative allowance for changes in expected cash flows from financial royalty assets	(635,801)
Decreases to the cumulative allowance for changes in expected cash flows from financial royalty assets	51,532
Current period provision for credit losses, net	669
Ending balance	(3,648,745)
Cumulative allowance for credit losses	$ 137,038	$ 137,707