Restructuring and Integration - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense	$ 386	$ 5,658	$ 5,249
Severance and restructuring cost	386	5,658	5,249
Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost	369	3,971	3,727
Severance and Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost	17	1,687	1,522
Autocam Precision Components Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense	400
Corporate and Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense			1,765
Wheeling Plant [Member] | Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected payment on reserve balance within next twelve months	1,000
Remaining reserve balance to be paid in 2019	$ 100
Wheeling Plant [Member] | Precision Engineered Products Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense		1,300
Severance and restructuring cost			900
Wheeling Plant [Member] | Autocam Precision Components Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration expense		4,300	2,600
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Site Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost		3,200	900
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Severance and Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost		800	700
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Asset Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost		$ 300
Wheeling Plant [Member] | Autocam Precision Components Group [Member] | Inventory Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost			1,000
Wheeling Plant [Member] | Corporate and Consolidations [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring cost			$ 1,800