Company's Debt Maturities on Calendar Year Basis (Detail) - USD ($) $ in Thousands		Sep. 30, 2019		Dec. 31, 2018
Debt Instrument [Line Items]
Total		$ 647,565
October 1 through December 31, 2019		29,233
2020		49,017
2021		61,977
2022		166,130
2023		77,760
Thereafter		263,448
Senior Secured Notes
Debt Instrument [Line Items]
Total		345,862		$ 365,481
October 1 through December 31, 2019		23,073
2020		29,733
2021		42,693
2022		42,693
2023		42,694
Thereafter		164,976
Convertible Notes | 5.75% Senior Subordinated Notes Due August 2023
Debt Instrument [Line Items]
Total		35,066	[1]	48,076
2023	[1]	35,066
Variable Funding Notes
Debt Instrument [Line Items]
Total		98,472	[2]	$ 95,273
Thereafter	[2]	98,472
Senior Secured Term Loan
Debt Instrument [Line Items]
Total	[3]	168,165
October 1 through December 31, 2019	[3]	6,160
2020	[3]	19,284
2021	[3]	19,284
2022	[3]	$ 123,437

[1] Reflects the debt carrying amount which is accounted for under the Fair Value Option in the condensed consolidated balance sheet as of September 30, 2019. The actual principal outstanding balance of the 5.75% Convertible Notes is $94.4 million as of September 30, 2019.

[2] Reflects the net debt carrying amount, effected by the outstanding balance of the original issue discount, in the condensed consolidated balance sheet as of September 30, 2019. The actual principal outstanding balance of the Variable Funding Notes is $100.0 million as of September 30, 2019.

[3] Reflects the net debt carrying amount, effected by the outstanding balance of the original issue discount, in the condensed consolidated balance sheet as of September 30, 2019. The actual principal outstanding balance of the Senior Secured Term Loan is $182.7 million as of September 30, 2019.