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Information Concerning Guarantor and Non-Guarantor Subsidiaries - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Apr. 18, 2013
Dec. 31, 2012
Aug. 01, 2011
Jul. 25, 2011
Condensed Financial Statements, Captions [Line Items]          
Total credit facility   $ 925.0 $ 925.0 $ 1,000.0 $ 1,000.0
Ownership percentage in subsidiaries 100.00%        
Year of formation of operating partnership and certain subsidiary guarantors 2012        
Guarantors [Member]
         
Condensed Financial Statements, Captions [Line Items]          
Number of wholly owned subsidiaries 4        
5% Senior Notes [Member]
         
Condensed Financial Statements, Captions [Line Items]          
Interest rate of Senior Notes 5.00%        
$1 Billion Credit Facility [Member]
         
Condensed Financial Statements, Captions [Line Items]          
Total credit facility $ 1,000.0