Segment Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Segment	Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Number of reportable segments	2
Assets	$ 3,434,696	$ 2,685,274
Portfolio Purchasing and Recovery [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,200,000
Tax Lien Transfer [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 257,800