|
Summary of Significant Accounting Policies - Amortization of Intangible Assets Over Estimated Useful Lives (Detail)
|
12 Months Ended |
|---|---|
|
Dec. 31, 2013
|
|
|
Maximum [Member] | Customer Relationships [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful life of intangible assets | 25 years |
|
Maximum [Member] | Customer Loyalty Payments [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful life of intangible assets | 7 years |
|
Minimum [Member] | Customer Relationships [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful life of intangible assets | 5 years |
|
Minimum [Member] | Customer Loyalty Payments [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful life of intangible assets | 3 years |