Income Taxes - Summary of Difference Between the Effective Income Tax Rate and the U.S. Statutory Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax provision at U.S. statutory income tax rate	21.00%	21.00%	21.00%	35.00%
State income tax, net of federal income tax	2.40%	1.00%	2.40%
Valuation allowances	(2.70%)	(0.40%)	0.60%
GILTI and Foreign-Derived Intangible Income		(0.60%)	1.10%
Foreign earnings	1.30%	(1.50%)	0.20%
U.S. — foreign rate differential	0.40%	(0.60%)	0.40%
CARES Act: 5-year NOL carryback	2.90%
Debt exchange – cancellation of debt	8.70%
Outside basis differences	0.30%
Effect of the Act on Federal deferred income tax assets and liabilities			(1.30%)
Goodwill Impairment	(10.30%)	(17.90%)
Uncertain tax positions	(1.40%)	(0.70%)
Other	0.30%	(0.10%)	(0.40%)
Effective income tax rate	22.90%	0.20%	24.00%