Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency
Pre-tax income	$ 146,300,000	$ 214,100,000	$ 282,400,000
Pre-tax income (loss) from foreign operations	4,500,000	6,400,000	$ 3,700,000
Valuation allowance	2,035,000	$ 3,973,000
Unrecognized tax benefits that would impact effective tax rate	200,000
Income tax-related interest and penalties	0
Foreign Tax Authority
Income Tax Contingency
Operating loss carryforwards	$ 2,200,000