Company's Debt Maturities on Calendar Year Basis (Detail) $ in Thousands	Sep. 30, 2016 USD ($)
Debt Instrument [Line Items]
Total	$ 1,312,260
October 1 through December 31, 2016	19,031
2017	76,123
2018	450,159
2019	76,123
2020	76,123
Thereafter	614,701
Senior Secured Notes
Debt Instrument [Line Items]
Total	667,065
October 1 through December 31, 2016	15,281
2017	61,123
2018	61,123
2019	61,123
2020	61,123
Thereafter	407,292
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018
Debt Instrument [Line Items]
Total	274,036	[1]
2018	274,036	[1]
Variable Funding Notes
Debt Instrument [Line Items]
Total	100,000
2018	100,000
Senior Secured Term Loan
Debt Instrument [Line Items]
Total	271,159	[2]
October 1 through December 31, 2016	3,750	[2]
2017	15,000	[2]
2018	15,000	[2]
2019	15,000	[2]
2020	15,000	[2]
Thereafter	$ 207,409	[2]

[1] Reflects the net debt carrying amount of the 1.50% Convertible Notes in the unaudited condensed consolidated balance sheet as of September 30, 2016, in accordance with accounting for convertible notes. After taking into effect the $104.9 million of repurchases of the 1.50% Convertible Notes as discussed above, the remaining principal amount owed to the holders of the 1.50% Convertible Notes is $295.1 million.

[2] Reflects the net debt carrying amount, effected by the outstanding balance of the original issue discount, in the unaudited condensed consolidated balance sheet as of September 30, 2016. The actual principal outstanding balance of the Senior Secured Term Loan is $292.5 million as of September 30, 2016.