Subsidiary Guarantors - Additional Information (Detail)
12 Months Ended
Dec. 31, 2013
Guarantor Subsidiaries
 
Condensed Financial Statements, Captions [Line Items]  
Subsidiary ownership percentage 100.00%
Non-Guarantor Subsidiaries
 
Condensed Financial Statements, Captions [Line Items]  
Subsidiary ownership percentage 51.00%