Segment Reporting Details 3 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets
Total Net Sales	$ 697,428	$ 629,100	$ 608,834	$ 550,621	$ 684,250	$ 591,687	$ 578,680	$ 524,355	$ 2,485,983	$ 2,378,972	$ 2,341,528
Total Segments Property, Plant and Equipment, Net	511,462				514,438				511,462	514,438
UNITED STATES
Revenues from External Customers and Long-Lived Assets
Total Net Sales									708,293	665,365	643,902
Total Segments Property, Plant and Equipment, Net	128,125				133,323				128,125	133,323
OTHER AMERICAS
Revenues from External Customers and Long-Lived Assets
Total Net Sales									166,150	167,647	161,853
Total Segments Property, Plant and Equipment, Net	4,110				4,831				4,110	4,831
TOTAL AMERICAS
Revenues from External Customers and Long-Lived Assets
Total Net Sales									874,443	833,012	805,755
Total Segments Property, Plant and Equipment, Net	132,235				138,154				132,235	138,154
GERMANY
Revenues from External Customers and Long-Lived Assets
Total Net Sales									204,747	195,521	183,859
Total Segments Property, Plant and Equipment, Net	32,984				29,008				32,984	29,008
FRANCE
Revenues from External Customers and Long-Lived Assets
Total Net Sales									127,363	122,658	123,007
Total Segments Property, Plant and Equipment, Net	5,802				6,737				5,802	6,737
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets
Total Net Sales									77,271	65,922	62,389
Total Segments Property, Plant and Equipment, Net	6,112				6,001				6,112	6,001
SWITZERLAND
Revenues from External Customers and Long-Lived Assets
Total Net Sales									71,347	74,574	65,430
Total Segments Property, Plant and Equipment, Net	235,593				243,697				235,593	243,697
OTHER EUROPE
Revenues from External Customers and Long-Lived Assets
Total Net Sales									398,645	377,353	355,266
Total Segments Property, Plant and Equipment, Net	6,983				7,936				6,983	7,936
TOTAL EUROPE
Revenues from External Customers and Long-Lived Assets
Total Net Sales									879,373	836,028	789,951
Total Segments Property, Plant and Equipment, Net	287,474				293,379				287,474	293,379
CHINA
Revenues from External Customers and Long-Lived Assets
Total Net Sales									404,293	396,620	422,894
Total Segments Property, Plant and Equipment, Net	83,412				74,546				83,412	74,546
REST OF WORLD
Revenues from External Customers and Long-Lived Assets
Total Net Sales									327,874	313,312	322,928
Total Segments Property, Plant and Equipment, Net	8,341				8,359				8,341	8,359
TOTAL ASIA REST OF WORLD
Revenues from External Customers and Long-Lived Assets
Total Net Sales									732,167	709,932	745,822
Total Segments Property, Plant and Equipment, Net	$ 91,753				$ 82,905				$ 91,753	$ 82,905