Segment Reporting Details 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets
Net Sales	$ 2,935,586	$ 2,725,053	$ 2,508,257
Total Segments Property, Plant and Equipment, Net	717,526	668,271
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Net Sales	933,419	888,241	815,153
Total Segments Property, Plant and Equipment, Net	234,395	220,401
OTHER AMERICAS
Revenues from External Customers and Long-Lived Assets
Net Sales	172,537	162,672	153,607
Total Segments Property, Plant and Equipment, Net	2,946	3,406
TOTAL AMERICAS
Revenues from External Customers and Long-Lived Assets
Net Sales		1,050,913	968,760
Total Segments Property, Plant and Equipment, Net	237,341	223,807
GERMANY
Revenues from External Customers and Long-Lived Assets
Net Sales	205,296	192,126	182,644
Total Segments Property, Plant and Equipment, Net	48,030	49,376
FRANCE
Revenues from External Customers and Long-Lived Assets
Net Sales	141,513	130,427	118,681
Total Segments Property, Plant and Equipment, Net	7,810	6,386
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Net Sales	70,378	64,361	61,513
Total Segments Property, Plant and Equipment, Net	17,347	19,617
SWITZERLAND
Revenues from External Customers and Long-Lived Assets
Net Sales	65,377	63,090	62,115
Total Segments Property, Plant and Equipment, Net	293,388	259,007
OTHER EUROPE
Revenues from External Customers and Long-Lived Assets
Net Sales	426,209	399,923	374,008
Total Segments Property, Plant and Equipment, Net	12,791	8,050
TOTAL EUROPE
Revenues from External Customers and Long-Lived Assets
Net Sales		849,927	798,961
Total Segments Property, Plant and Equipment, Net	379,366	342,436
CHINA
Revenues from External Customers and Long-Lived Assets
Net Sales	506,360	439,373	374,996
Total Segments Property, Plant and Equipment, Net	87,643	92,269
REST OF WORLD
Revenues from External Customers and Long-Lived Assets
Net Sales	414,497	384,840	365,540
Total Segments Property, Plant and Equipment, Net	13,176	9,759
TOTAL ASIA REST OF WORLD
Revenues from External Customers and Long-Lived Assets
Net Sales		824,213	$ 740,536
Total Segments Property, Plant and Equipment, Net	$ 100,819	$ 102,028