Annual report pursuant to Section 13 and 15(d)

Deferred Charges and Other Assets Net - Additional Information (Detail)

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Deferred Charges and Other Assets Net - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Other Noncurrent Assets Disclosure [Line Items]  
Debt issue costs $ 18,453
Percentage of senior subordinated notes 5.125%