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Income Taxes - Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory rate on income before income taxes	21.00%	21.00%	35.00%
Impact of foreign operations	(15.30%)	9.50%	(14.10%)
Impacts of SAB 118		6.7
Effects of statutory rate change			(8.50%)
State income taxes, net of federal tax effect	3.30%	(1.40%)	2.10%
Permanent differences	2.40%	(4.10%)	1.80%
Goodwill impairment		(36.60%)
Change in valuation allowance	2.90%	(1.40%)	1.60%
Unrecognized tax benefit release	0.30%	3.10%	(0.80%)
Interest disallowance	4.20%	(2.20%)
Federal tax credits	(1.30%)	1.00%
Other	1.50%	0.50%	(1.40%)
Effective income tax rate	19.00%	(3.90%)	15.70%

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