|
Estimated Fair Value of Debt (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
|
|---|---|
| Debt Instrument [Line Items] | |
| Debt instrument, fair value | $ 559,946 |
|
Revolving credit facility
|
|
| Debt Instrument [Line Items] | |
| Debt instrument, fair value | 135,990 |
|
2018 Notes
|
|
| Debt Instrument [Line Items] | |
| Debt instrument, fair value | 404,000 |
|
Vehicle Financings
|
|
| Debt Instrument [Line Items] | |
| Debt instrument, fair value | $ 19,956 |