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Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Contingencies And Commitments [Line Items]
Material reserves for litigation	$ 0
Purchase price of receivable portfolios	435,800,000
Purchase price	35,500,000
Purchase commitments beyond December, 2014	0
Maximum [Member]
Contingencies And Commitments [Line Items]
Attorneys' fees and costs	$ 550,000

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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