Investment in Receivable Portfolios, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Face value of receivable portfolios	$ 2,800,000		$ 5,500,000		$ 6,400,000	$ 6,600,000
Purchase price of receivable portfolios	$ 233,116		$ 418,780		$ 489,869	$ 543,934
Purchase cost as a percentage of face value	8.20%		7.60%		7.70%	8.30%
Estimated future collections at acquisition for receivable portfolios	$ 416,900		$ 806,500		$ 875,500	$ 1,004,000
Revenue recognized, net	267,452	$ 270,094	270,301	$ 264,110	537,546	534,411
Estimate of Zero Basis Cash Flows [Member]
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Revenue recognized, net	$ 33,738	$ 31,547	26,876	$ 15,571	$ 65,300	42,400
dlc [Member]
Certain Loans Acquired in Transfer Accounted for as Debt Securities Accretable Yield Movement Schedule [Line Items]
Investment in receivable portfolios			$ 216,000			$ 216,000