|
Securitization of Receivables - Additional Information (Detail) (USD $)
|
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Dec. 31, 2012
|
|
| Accounts Receivable Securitization [Line Items] | |||||
| Gain on securitization of receivables | $ 1,885,000 | $ 342,000 | $ 2,770,000 | $ 1,972,000 | |
| Account receivables managed | 1,900,000,000 | 1,900,000,000 | 1,600,000,000 | ||
|
Asset-backed Securities, Securitized Loans and Receivables [Member]
|
|||||
| Accounts Receivable Securitization [Line Items] | |||||
| Account receivables managed | $ 1,500,000,000 | $ 1,500,000,000 | $ 1,400,000,000 | ||
|
Minimum [Member]
|
|||||
| Accounts Receivable Securitization [Line Items] | |||||
| Annual servicing fees | 0.05% | ||||
|
Maximum [Member]
|
|||||
| Accounts Receivable Securitization [Line Items] | |||||
| Annual servicing fees | 0.20% | ||||