Segment And Geographic Information (Net Sales By Major Geographical Areas) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,228,179	$ 1,225,456	$ 1,243,862
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	482,039	496,746	495,951
EMEIA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	389,843	409,119	412,401
APAC [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 356,297	$ 319,591	$ 335,510