Quarterly report pursuant to Section 13 or 15(d)

Schedule of Long-Term Debt (Detail)

v2.4.0.8
Schedule of Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Long-term Debt unsecured $ 900,000 $ 900,000
Debt premiums, net of amortization 15,984 17,611
Long-term debt secured 137,000 170,000
Total long-term debt 1,052,984 1,087,611
Current maturities of long-term debt      
Long-term debt, less current maturities $ 1,052,984 $ 1,087,611