Segment Information (Schedule Of Long-Lived Assets By Geographic Area) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Long-lived assets	$ 460,808	$ 949,620	$ 571,001
Americas [Member]
Segment Reporting Information [Line Items]
Long-lived assets	114,680	570,049	426,221
Germany [Member]
Segment Reporting Information [Line Items]
Long-lived assets	14,088	19,994	23,134
Other EMEA [Member]
Segment Reporting Information [Line Items]
Long-lived assets	271,892	312,384	71,269
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 60,148	$ 47,193	$ 50,377