Goodwill - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Impairment of goodwill	$ 0	$ 0	$ 0
Autocam Precision Components Group [Member]
Goodwill [Line Items]
Accumulated Impairment of goodwill	4,300,000	4,300,000	4,300,000
Precision Engineered Products Group [Member]
Goodwill [Line Items]
Accumulated Impairment of goodwill	$ 11,700,000	$ 11,700,000	$ 11,700,000