Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Federal income tax rate	21.00%	21.00%	21.00%
Federal net operating loss carryforwards expiration period start	2031
Federal net operating loss carryforwards expiration period end	2033
State net operating loss carryforwards expiration period start	2028
State net operating loss carryforwards expiration period end	2037
Deferred tax assets, valuation allowance	$ 1.7
Unrecognized tax benefits due to uncertain tax positions	4.3	$ 6.7	$ 6.0
Unrecognized tax benefits which would effect effective tax rate if recognized	1.2
Unrecognized tax benefits, significant decrease possible within next 12 months	3.6
Unrecognized tax benefits, amount would impact effective tax rate	0.6
Accrued interest and penalties related to uncertain tax positions	0.1
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Federal Net operating loss carrying forward	$ 59.0
Domestic Tax Authority | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Income tax year under examination	2017
Domestic Tax Authority | Latest Tax Year
Operating Loss Carryforwards [Line Items]
Income tax year under examination	2019
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Federal Net operating loss carrying forward	$ 5.0
Foreign Tax Authority | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Income tax year under examination	2007
Foreign Tax Authority | Latest Tax Year
Operating Loss Carryforwards [Line Items]
Income tax year under examination	2018
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Federal Net operating loss carrying forward	$ 58.0
State and Local Jurisdiction | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Income tax year under examination	2016
State and Local Jurisdiction | Latest Tax Year
Operating Loss Carryforwards [Line Items]
Income tax year under examination	2019