Quarterly report pursuant to Section 13 or 15(d)

Securitization of Receivables - Schedule of Cash Flows between us and Securitization Trusts (Detail)

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Securitization of Receivables - Schedule of Cash Flows between us and Securitization Trusts (Detail) (Securitization Trust [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Securitization Trust [Member]
   
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items]    
Purchase of receivables securitized $ 65,069   
Proceeds from securitizations 67,043   
Servicing fees received 271 265
Cash received from residual assets $ 510 $ 121