Investment in Receivable Portfolios, Net - Change in the Balance of the Investment in Receivable Portfolios (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Investment in Receivables Portfolio [Roll Forward]
Balance, beginning of period	$ 3,225,678	$ 3,166,018	$ 3,291,918	$ 3,328,150
Purchases of receivable portfolios	142,728	147,939	312,906	362,052
Deconsolidation of receivables portfolio	0	(2,822)	0	(2,822)
Put-backs and Recalls	(3,204)	(6,326)	(6,357)	(11,394)
Disposals and transfers to assets held for sale	(2,647)	(1,182)	(4,312)	(2,713)
Cash collections	(612,427)	(508,215)	(1,218,888)	(1,035,494)
Revenue from receivable portfolios	328,150	335,287	666,168	692,652
Changes in expected current period recoveries	109,396	108,572	200,797	118,887
Changes in expected future period recoveries	(43,218)	(42,565)	(90,082)	(151,541)
Foreign currency adjustments	9,545	4,535	1,851	(96,536)
Balance, end of period	$ 3,154,001	$ 3,201,241	$ 3,154,001	$ 3,201,241