Significant Accounting Policies (Additional Information) (Detail) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2016
Accounting Policies [Line Items]
Percentage of foreign and export sales		46.90%	44.20%	46.20%
Export sales		$ 53,200	$ 52,500	$ 57,600
Percentage of sales to automotive market		56.20%	56.60%	54.10%
Progress billings adjustment		$ 893	$ 316
Finite-lived intangible asset useful life		12 years
Research and development expense		$ 9,000	8,500	$ 9,000
Deferred tax assets, net, current		0	$ 4,613
Accounting Standards Update 2015-17 | New Accounting Pronouncement, Early Adoption, Effect
Accounting Policies [Line Items]
Deferred tax assets, net, current					$ (4,600)
Accounting Standards Update 2016-09 | New Accounting Pronouncement, Early Adoption, Effect
Accounting Policies [Line Items]
Recently adopted accounting standards		$ 1,100
Cumulative effect to retained earnings due to early adoption of new accounting pronouncement	$ 100
Minimum
Accounting Policies [Line Items]
Finite-lived intangible asset useful life		4 years
Maximum
Accounting Policies [Line Items]
Finite-lived intangible asset useful life		14 years
Ford Motor Company
Accounting Policies [Line Items]
Percentage of accounts receivable from significant customer		14.20%
Percentage of foreign and export sales		19.60%	18.20%	16.50%