Acquisitions (Details) € in Thousands, SFr in Thousands, $ in Thousands			3 Months Ended					5 Months Ended	12 Months Ended
	Aug. 31, 2016 CHF (SFr)	Aug. 31, 2016 USD ($)	Sep. 30, 2016 subsidiary	Dec. 31, 2015 CHF (SFr) employee subsidiary	Dec. 31, 2015 USD ($) subsidiary	Sep. 30, 2015 EUR (€) subsidiary	Sep. 30, 2015 USD ($) subsidiary	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Aug. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) employee	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Period of acquisitions									2 years
Number of subsidiaries included in business acquisition | subsidiary			3	2	2	1	1
Goodwill									$ 633,436		$ 587,992		$ 594,949
FOBOHA Business [Member]
Business Acquisition [Line Items]
Adjustments under terms of Share Purchase Agreement	SFr 11,342									$ 11,530
Cash paid	SFr 136,337	$ 138,596
Acquisition related costs									2,193
Sales since date of acquisition									18,348
Other intangible assets										39,800
Goodwill										$ 73,688
Priamus [Member]
Business Acquisition [Line Items]
Aggregate purchase price				SFr 9,879	$ 10,111
Number of employees | employee				40							40
Acquisition related costs									574
Sales since date of acquisition					$ 2,028
Priamus System Technologies AG [Member]
Business Acquisition [Line Items]
Number of subsidiaries included in business acquisition | subsidiary				2	2
Thermoplay [Member]
Business Acquisition [Line Items]
Aggregate purchase price						€ 58,066	$ 63,690
Adjustments under terms of Share Purchase Agreement				SFr 1,556		€ 17,054					$ 1,592	$ 18,706
Acquisition related costs									$ 2,195
Sales since date of acquisition								$ 13,593