Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Federal statutory tax rate	21.00%	21.00%	21.00%	21.00%
Decrease in effective tax rate on continuing operations	(23.16%)
Provision for income taxes	(0.06%)	23.10%	23.17%
Net tax benefit	$ 490	$ (411,897)	$ (748,307)
CARES Act NOL carryback	(5.77%)
Tax loss on investment in foreign joint venture	(22.73%)
State income taxes, net of federal income tax benefit	(3.36%)	3.16%	2.52%
Deferred tax assets write-off			$ 21,300
Deferred tax assets write-off, effective tax reconciliation impact			0.66%
Non-current deferred tax liabilities included in deferred credits and other liabilities	$ 596,439	$ 430,971
Current federal and state income taxes receivable	456,100	240,800
Net federal, state and foreign income taxes paid (refund received)	50,300	525,200	$ 561,100
Unrecognized tax benefits	47,965	50,920	48,605	$ 48,845
Amount of unrecognized tax benefits affects effective tax rate	47,300	50,200
Estimate of possible decrease in gross uncertain tax positions, exclusive of interest, as a result of the expiration of the statute of limitations	7,300
Expense (benefit) for interest and penalties	100	700	$ (4,000)
Accrued interest and penalties related to uncertain tax positions	12,000	11,900
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
State NOL carryforwards	$ 1,410,000	681,800
State and Local Jurisdiction [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Unused NOL carryforward expiration year	2040
State and Local Jurisdiction [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Unused NOL carryforward expiration year	2021
Foreign Country [Member]
Income Tax Disclosure [Line Items]
Foreign NOL carryforwards	$ 142,300	$ 149,800
Foreign Country [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Unused NOL carryforward expiration year	2040
Foreign Country [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Unused NOL carryforward expiration year	2021
CARES Act [Member]
Income Tax Disclosure [Line Items]
Federal statutory tax rate	35.00%
Tax credits	$ (48,200)
CARES Act NOL carryback	(5.77%)
Percentage of impairment	11.20%
Impairments	$ 445,600
CARES Act [Member] | State Tax Credits [Member]
Income Tax Disclosure [Line Items]
Provision for income taxes	(5.41%)
Net tax benefit	$ 45,200
CARES Act [Member] | Loss on Foreign Joint Venture [Member]
Income Tax Disclosure [Line Items]
Provision for income taxes		(24.16%)
Net tax benefit		$ 201,900
Tax loss on investment in foreign joint venture	(22.73%)
State income taxes, net of federal income tax benefit	(1.43%)