| Supplement Guarantor Information - Additional Information (Detail) | Dec. 31, 2013 | 
|---|---|
| Debt Disclosure [Line Items] | |
| Senior notes interest rate | 8.50% | 
| X | ||||||||||
| 
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Details 
 |