Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Cancellation of indebtedness income	$ 552,671,000				$ 552,671,000
Cancellation of indebtedness income excluded from income ax	500,989,000				500,989,000
Reduction in tax due to discharge of indebtedness					217,532,000
Tax effect due to discharge of indebtedness					47,663,000
Reduction in tax with permanent differences	283,457,000				283,457,000
Tax effect with permanent differences					59,526,000
Net operating loss carryforwards	525,000				525,000
Foreign tax credit carryforwards	4,101,000		$ 5,397,000		4,101,000	$ 5,397,000
Other assets, net	309,965,000		262,265,000		309,965,000	262,265,000
Deferred income tax liabilities	34,705,000		126,081,000		34,705,000	$ 126,081,000
Net deferred income tax assets included in assets held for sale	2,628,000				$ 2,628,000
State tax credit carryforwards expiration year					2022
Federal statutory rate					21.00%	21.00%	21.00%	35.00%
Effective rate benefit					2.90%
Income tax reconciliation cancellation of debt					$ 59,526,000
Debt exchange – cancellation of debt					8.70%
Goodwill Impairment charge	0	$ 401,436,000	556,056,000	$ 556,056,000
Goodwill impairment loss for which tax benefit has not been recognised					$ 336,238,000	$ 455,689,000
Goodwill impairment impact on income tax rate					10.30%	17.90%
Transition tax	4,205,000				$ 4,205,000
Unrecognized tax benefits that would impact effective tax rate	5,790,000		4,891,000		5,790,000	$ 4,891,000
Accrued interest and penalties	949,000		618,000		$ 949,000	618,000
Minimum [Member]
Income Tax [Line Items]
Deferred tax assets operating loss carryforwards state and local expiration					15 years
Maximum [Member]
Income Tax [Line Items]
Deferred tax assets operating loss carryforwards state and local expiration					20 years
CANADA [Member]
Income Tax [Line Items]
Net operating loss carryforwards	284,000				$ 284,000
Mexico
Income Tax [Line Items]
Net operating loss carryforwards	2,555,000				2,555,000
Other Assets, Net [Member]
Income Tax [Line Items]
Other assets, net	$ 283,000		$ 20,000		$ 283,000	$ 20,000