Sub Event (Details) - USD ($) $ in Thousands				3 Months Ended
	May 10, 2018	Apr. 27, 2018	Apr. 03, 2018	Mar. 31, 2018	Apr. 01, 2017
Subsequent Event [Line Items]
Business Acquisition, Pro Forma Revenue				$ 587,242	$ 597,078
Ve.Ma.C [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Transferred			$ 12,300
Business Acquisition, Pro Forma Revenue			$ 15,000
Josper [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Transferred	$ 43,100
Business Acquisition, Pro Forma Revenue	$ 20,000
Firex [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business Combination, Consideration Transferred		$ 64,600
Business Acquisition, Pro Forma Revenue		$ 20,000