Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Federal tax operating loss carryforwards, net	$ 465,100	$ 465,100
Foreign tax credit carryforward	18,500	18,500
State tax operating loss carryforwards, net	132,200	132,200
Valuation Allowance, Deferred Tax Asset, Change in Amount		$ 33,100	$ 2,295	$ (1,011)
Federal statutory rate		35.00%
Effective Income Tax Rate Reconciliation Income Excluded from U.S. Taxable Income		$ 0	(9,478)	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	125,225	(125,225)	$ 0	$ 0
Valuation Allowances and Reserves, Balance	35,400	$ 35,400
Internal Revenue Service (IRS) | Minimum
Income Taxes [Line Items]
Operating loss carry forward, expiration year		2031
Internal Revenue Service (IRS) | Maximum
Income Taxes [Line Items]
Operating loss carry forward, expiration year		2037
Foreign markets | Minimum
Income Taxes [Line Items]
Tax credit carry forward, expiration year		2019
Foreign markets | Maximum
Income Taxes [Line Items]
Tax credit carry forward, expiration year		2027
State and Local Jurisdiction | Minimum
Income Taxes [Line Items]
Operating loss carry forward, expiration year		2030
State and Local Jurisdiction | Maximum
Income Taxes [Line Items]
Operating loss carry forward, expiration year		2037
BRAZIL
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	37,800	$ 37,800
MEXICO
Income Taxes [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 14,500	$ 14,500