Income Taxes - Reconciliation for Significant Differences in Tax at Statutory and Effective Rates (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal income tax expense	21.00%	21.00%	35.00%
State income tax expense, net of federal tax effect	6.10%	9.70%	5.00%
Effect of differences in U.S. and foreign statutory rates	0.60%	2.00%	1.90%
Uncertain tax positions	(0.30%)	(0.80%)	0.00%
Provision to return	(1.60%)	(40.60%)	(0.70%)
Non-deductible expenses	(13.00%)	(16.90%)	(48.00%)
Other	(0.40%)	(0.60%)	(0.20%)
Foreign tax credit	(0.00%)	(0.00%)	20.30%
Undistributed foreign earnings	0.20%	4.50%	57.30%
Effect of change in federal statutory rate	0.00%	0.00%	(23.00%)
Valuation allowance	(16.20%)	14.20%	(49.60%)
Effective income tax rate	(3.60%)	(7.50%)	(2.00%)