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Investment in Receivable Portfolios, Net - Summary of Accretable Yield and an Estimate of Zero Basis Future Cash Flows (Detail) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Aug. 06, 2014 | Feb. 07, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield and Estimate of Zero Basis Future Cash Flows Movement Schedule [Roll Forward] |  |  |  |  |
Beginning balance |  |  | $ 3,059,713 | $ 2,399,936 |
Revenue recognized, net |  |  | (1,072,436) | (992,832) | $ (744,870)
Net additions on existing portfolios |  |  | 529,965 | 432,579 |
Additions for current purchases |  |  | 846,632 | 1,332,121 |
Effect of foreign currency translation |  |  | (93,203) | (112,091) |
Ending balance |  |  | 3,270,671 | 3,059,713 | 2,399,936
Purchase price of receivable portfolios |  |  | 1,023,722 | 1,251,360 | 1,204,779
Marlin [Member] |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield and Estimate of Zero Basis Future Cash Flows Movement Schedule [Roll Forward] |  |  |  |  |
Purchase price of receivable portfolios |  | $ 208,500 |  |  |
Atlantic Credit & Finance [Member] |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield and Estimate of Zero Basis Future Cash Flows Movement Schedule [Roll Forward] |  |  |  |  |
Purchase price of receivable portfolios | $ 105,400 |  |  |  |
Accretable Yield [Member] |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield and Estimate of Zero Basis Future Cash Flows Movement Schedule [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 2,993,321 | 2,391,471 |
Revenue recognized, net |  |  | (964,225) | (958,332) |
Net additions on existing portfolios |  |  | 263,713 | 340,152 |
Additions for current purchases |  |  | 846,632 | 1,332,121 |
Effect of foreign currency translation |  |  | (91,801) | (112,091) |
Ending balance |  |  | 3,047,640 | 2,993,321 | 2,391,471
Estimate of Zero Basis Cash Flows [Member] |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield and Estimate of Zero Basis Future Cash Flows Movement Schedule [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 66,392 | 8,465 |
Revenue recognized, net |  |  | (108,211) | (34,500) |
Net additions on existing portfolios |  |  | 266,252 | 92,427 |
Additions for current purchases |  |  | 0 | 0 |
Effect of foreign currency translation |  |  | (1,402) | 0 |
Ending balance |  |  | $ 223,031 | $ 66,392 | $ 8,465

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