Aggregate Amounts of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Long Term Debt Maturities Repayments Of Principal [Line Items]
2014	$ 404,700	[1]
2015
2016
2017
2018 and thereafter	$ 930,000

[1] (1) The Convertible Senior Subordinated Notes are included in amounts that will mature in 2014 due to the trigger of the conversion feature, which is described in more detail in the “Convertible Notes” section above.