Liabilities Subject to Compromise (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Reorganizations [Abstract]
Deferred income taxes	$ 219,128	$ 219,250
Accrued liabilities and other liabilities	68,944	89,897
Accounts payable	18,257	18,290
Accounts payable, accrued and other liabilities	306,329	327,437
Term Loan	1,700,078	1,722,209
7.75% Senior Notes	610,000	610,000
Accrued interest	27,577	27,577
Long-term debt and accrued interest	2,337,655	2,359,786
Total liabilities subject to compromise	$ 2,643,984	$ 2,687,223