Annual report pursuant to Section 13 and 15(d)

Schedule of Fair Value of Derivatives Financial Instruments and Senior Notes (Detail)

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Schedule of Fair Value of Derivatives Financial Instruments and Senior Notes (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative assets $ 141  
Derivative liabilities 9,423  
Fair Value, Inputs, Level 2
   
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative assets 141  
Derivative liabilities 9,423 9,401
8.50% Senior Notes 962,460 963,000
Revolving bank credit facility $ 290,000 $ 170,000