Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Federal Income Tax Rate		35.00%
Expense (benefit) from revaluation of net deferred tax liabilities		$ (4,683,000)
Provision for income taxes related to deemed mandatory repatriation		1,250,000
Interest and penalties related to unrecognized tax benefits accrued		2,257,000	$ 408,000	$ 335,000
Deferred liability for federal and state income taxes recorded		0
Undistributed foreign earnings reinvested		$ 35,084,000
Scenario Forecast
Income Taxes [Line Items]
Federal Income Tax Rate	21.00%