Description of Business and Summary of Significant Accounting Policies - Accounts Payable and Accrued Liabilities of Continuing Operations (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Payable and Accrued Liabilities [Abstract]
Trade accounts payable	$ 32,663	$ 32,315
Property and other taxes payable	34,282	34,844
Deferred revenues	51,232	41,080
Accrued salaries and benefits	25,178	20,567
Accrued interest payable	11,179	8,152
Other accrued liabilities	25,115	26,247
Total accounts payable and accrued liabilities	$ 179,649	$ 163,205