Segment Information & Geographic Data - Net Sales to Significant Customers as a Percent of Total Net Sales (Detail) - Significant customers	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Customer A | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	22.30%	20.70%	16.60%
Customer A | Accounts Receivable
Revenue, Major Customer [Line Items]
Concentration risk percentage	22.70%	20.40%
Customer A | AIT | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	7.30%	6.50%	6.10%
Customer A | EVM | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	15.00%	14.20%	10.50%
Customer B | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	13.60%	13.90%	13.70%
Customer B | Accounts Receivable
Revenue, Major Customer [Line Items]
Concentration risk percentage	13.40%	6.70%
Customer B | AIT | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	5.10%	4.90%	4.70%
Customer B | EVM | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	8.50%	9.00%	9.00%
Customer C | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	12.60%	17.70%	18.30%
Customer C | Accounts Receivable
Revenue, Major Customer [Line Items]
Concentration risk percentage	14.80%	13.60%
Customer C | AIT | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	3.10%	4.80%	5.30%
Customer C | EVM | Net sales
Revenue, Major Customer [Line Items]
Concentration risk percentage	9.50%	12.90%	13.00%