Investment in Receivable Portfolios, Net - Transition Approach (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Investment in receivable portfolios, carrying value		$ 3,291,918	$ 3,283,984	$ 3,137,893	$ 2,890,613
Allowance for credit losses	$ 79,028,043	1,703,420
Amortized cost	82,356,193
Noncredit discount	132,533,142	3,464,670
Face value	214,889,335	5,827,962
Write-off of amortized cost	(82,356,193)	(2,363,292)
Write-off of noncredit discount	(132,533,142)	(3,464,670)
Negative allowance	3,328,150	$ 659,872
Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Investment in receivable portfolios, carrying value			44,166
Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Investment in receivable portfolios, carrying value			$ 3,328,150
Investment In Receivable Portfolios, Net
Financing Receivable, Allowance for Credit Loss [Line Items]
Investment in receivable portfolios, carrying value	$ 3,328,150