|
Supplementary Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Supplemental Financial Information [Line Items] | ||
| Deferred mobilization fees | $ 8.1 | $ 1.6 |
| Accrued interest expense | 16.8 | 9.7 |
| Worker's compensation liabilities | 2.7 | 2.3 |
| Accrued payroll and payroll taxes | 33.5 | 26.0 |
|
Other Long Term Obligations [Member]
|
||
| Supplemental Financial Information [Line Items] | ||
| Worker's compensation liabilities | $ 3.0 | $ 2.5 |