Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Pretax income from continuing operations	$ 272,000	$ 11,948,000	$ 10,286,000	$ 18,409,000
Income tax expense (benefit)	2,553,000	$ 5,655,000	5,161,000	$ 7,513,000
Pension and restructuring charges			7,800,000
Offsetting of income tax			2,600,000
Decrease in valuation allowance			(3,400,000)
Gross unrecognized tax benefits	33,700,000		33,700,000		$ 30,500,000
Unrecognized tax benefits that would impact effective tax rate	22,900,000		22,900,000
Minimum [Member]
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits balance may decrease within the next twelve months	0		0
Maximum [Member]
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits balance may decrease within the next twelve months	$ 1,200,000		1,200,000
Pension and Restructuring Charges [Member]
Income Tax Contingency [Line Items]
Income tax expense (benefit)			$ 0