Product Line and Geographic Information - Customers Accounted Revenues by Geographic Location (Detail) - Sales [Member] - Geographic Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Europe, Middle East, & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	23.00%	16.00%	23.00%	16.00%
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	7.00%	9.00%	7.00%	10.00%
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	4.00%	2.00%	4.00%	2.00%
Total Foreign Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	34.00%	27.00%	34.00%	28.00%