Company's Debt Maturities on Calendar Year Basis (Detail) $ in Thousands	Mar. 31, 2017 USD ($)
Debt Instrument [Line Items]
Total	$ 1,175,970
April 1 through December 31, 2017	54,514
2018	453,687
2019	72,685
2020	72,685
2021	196,558
Thereafter	325,841
Senior Secured Notes
Debt Instrument [Line Items]
Total	599,845
April 1 through December 31, 2017	43,264
2018	57,685
2019	57,685
2020	57,685
2021	57,685
Thereafter	325,841
Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018
Debt Instrument [Line Items]
Total	281,002	[1]
2018	281,002	[1]
Variable Funding Notes
Debt Instrument [Line Items]
Total	100,000
2018	100,000
Senior Secured Term Loan
Debt Instrument [Line Items]
Total	195,123	[2]
April 1 through December 31, 2017	11,250	[2]
2018	15,000	[2]
2019	15,000	[2]
2020	15,000	[2]
2021	$ 138,873	[2]

[1] Reflects the net debt carrying amount of the 1.50% Convertible Notes in the unaudited condensed consolidated balance sheet as of March 31, 2017, 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 March 31, 2017. The actual principal outstanding balance of the Senior Secured Term Loan is $209.7 million as of March 31, 2017.