Segment Reporting Details 3 (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets
Total Net Sales	$ 673,535	$ 604,154	$ 582,057	$ 535,701	$ 697,428	$ 629,100	$ 608,834	$ 550,621	$ 2,395,447	$ 2,485,983	$ 2,378,972
Total Segments Property, Plant and Equipment, Net	517,229				511,462				517,229	511,462
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Total Net Sales									768,815	708,293	665,365
Total Segments Property, Plant and Equipment, Net	132,255				128,125				132,255	128,125
OTHER AMERICAS
Revenues from External Customers and Long-Lived Assets
Total Net Sales									157,962	166,150	167,647
Total Segments Property, Plant and Equipment, Net	4,120				4,110				4,120	4,110
TOTAL AMERICAS
Revenues from External Customers and Long-Lived Assets
Total Net Sales									926,777	874,443	833,012
Total Segments Property, Plant and Equipment, Net	136,375				132,235				136,375	132,235
GERMANY
Revenues from External Customers and Long-Lived Assets
Total Net Sales									176,491	204,747	195,521
Total Segments Property, Plant and Equipment, Net	29,100				32,984				29,100	32,984
FRANCE
Revenues from External Customers and Long-Lived Assets
Total Net Sales									110,477	127,363	122,658
Total Segments Property, Plant and Equipment, Net	5,174				5,802				5,174	5,802
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Total Net Sales									71,679	77,271	65,922
Total Segments Property, Plant and Equipment, Net	15,854				6,112				15,854	6,112
SWITZERLAND
Revenues from External Customers and Long-Lived Assets
Total Net Sales									64,622	71,347	74,574
Total Segments Property, Plant and Equipment, Net	233,763				235,593				233,763	235,593
OTHER EUROPE
Revenues from External Customers and Long-Lived Assets
Total Net Sales									349,178	398,645	377,353
Total Segments Property, Plant and Equipment, Net	6,158				6,983				6,158	6,983
TOTAL EUROPE
Revenues from External Customers and Long-Lived Assets
Total Net Sales									772,447	879,373	836,028
Total Segments Property, Plant and Equipment, Net	290,049				287,474				290,049	287,474
CHINA
Revenues from External Customers and Long-Lived Assets
Total Net Sales									362,950	404,293	396,620
Total Segments Property, Plant and Equipment, Net	82,528				83,412				82,528	83,412
REST OF WORLD
Revenues from External Customers and Long-Lived Assets
Total Net Sales									333,273	327,874	313,312
Total Segments Property, Plant and Equipment, Net	8,277				8,341				8,277	8,341
TOTAL ASIA REST OF WORLD
Revenues from External Customers and Long-Lived Assets
Total Net Sales									696,223	732,167	$ 709,932
Total Segments Property, Plant and Equipment, Net	$ 90,805				$ 91,753				$ 90,805	$ 91,753