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Equity (Schedule of Accumulated other comprehensive income (loss)) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance as of beginning of period $ (10,774) $ (3,647)
Other comprehensive income (loss) before reclassifications 4,204 (7,136)
Amounts reclassified from accumulated other comprehensive income 68 1,108
Other comprehensive income (loss) 4,272 (6,028)
Balance as of end of period (6,502) (9,675)
Net unrealized gain (loss) on cash flow hedges [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance as of beginning of period (107) (1,243)
Other comprehensive income (loss) before reclassifications 863 (728)
Amounts reclassified from accumulated other comprehensive income 68 1,108
Other comprehensive income (loss) 931 380
Balance as of end of period 824 (863)
Foreign currency translation adjustment [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance as of beginning of period (10,667) (2,404)
Other comprehensive income (loss) before reclassifications $ 3,341 $ (6,408)
Amounts reclassified from accumulated other comprehensive income
Other comprehensive income (loss) $ 3,341 $ (6,408)
Balance as of end of period $ (7,326) $ (8,812)