Equity (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	$ (13,286)	$ (5,501)
Activity before reclassifications, net of tax	(5,335)	(603)
Reclassifications, net of tax	0	0
Activity, net of tax	(5,335)	(603)
Accumulated other comprehensive loss, ending balance	(18,621)	(6,104)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	(7,998)	(105)
Activity before reclassifications, net of tax	(5,335)	(824)
Reclassifications, net of tax	0	0
Activity, net of tax	(5,335)	(824)
Accumulated other comprehensive loss, ending balance	(13,333)	(929)
Available-for-Sale-Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	(5,288)	(5,396)
Activity before reclassifications, net of tax	0	221
Reclassifications, net of tax	0	0
Activity, net of tax	0	221
Accumulated other comprehensive loss, ending balance	$ (5,288)	$ (5,175)