Quarterly report pursuant to Section 13 or 15(d)

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

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Schedule of Fair Value of Derivatives Financial Instruments and Long-Term Senior Notes (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative assets   $ 141
Derivative liabilities 12,104 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 12,104 9,423
8.50% Senior Notes 974,250 962,460
Revolving bank credit facility $ 279,000 $ 290,000