Debt - Additional Information 2 (Detail) (USD $) In Millions, unless otherwise specified			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Feb. 25, 2014 Subsequent Event [Member]
Debt Instrument [Line Items]
Eligible estimated remaining collections for consumer receivables			55.00%
Total estimated remaining collections			35.00%
Borrowing base as percentage of eligible estimated collection range start			30.00%
Borrowing base as percentage of eligible estimated collection range end			35.00%
Percentage of eligible estimated remaining collections			33.00%
Percentage of multiplying factor			95.00%
Borrowing base description			A borrowing base equal to (1) the lesser of (i) (a) 55% of eligible estimated remaining collections for consumer receivables subject to bankruptcy proceedings, provided that the amount described in this clause (i)(a) may not exceed 35% of the amount described in clauses (i)(a) and (i)(b), plus (b) 30%—35% (depending on the Company’s trailing 12-month cost per dollar collected) of all other eligible estimated remaining collections, initially set at 33%, and (ii) the product of the net book value of all receivable portfolios acquired on or after January 1, 2005 multiplied by 95%, minus (2) (x) the aggregate principal amount outstanding of the Senior Secured Notes (as defined below) plus (y) the aggregate principal amount outstanding under the term loans;
Allowance of additional unsecured indebtedness			$ 450.0
Company's repurchases, common stock			50.0
Percentage of acquisitions excluded			50.00%
Acquisition limit per acquisition			75.0
Acquisition limit			225.0
Amount outstanding	$ 496.6
Revolving credit facility, interest rate	3.11%	4.06%