Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Long-term net deferred tax liabilities	$ 19,954	$ 21,932
Operating loss carryforwards related to a prior acquisition	3,400
U.S. federal and state capital loss carryforwards	1,200
Valuation allowance	1,237	2,274	$ 2,574	$ 2,686
Unremitted earnings	25,600
Unrecognized tax benefits	$ 28	345	$ 799	$ 806
Income tax expense to settle a foreign tax audit		300
U.S. Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards, limitations on use	The U.S. federal net operating loss carryforwards resulting from taxable years beginning after December 31, 2017 can be carried forward indefinitely and can be used to offset 80% of U.S. taxable income.
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Operating loss carryforwards	$ 27,600
Other Assets [Member]
Income Taxes [Line Items]
Long-term net deferred tax assets	1,600	1,000
Non-current Liabilities [Member]
Income Taxes [Line Items]
Long-term net deferred tax liabilities	$ 21,500	$ 22,900