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Earnings per Share (Schedule of Calculation of Basic and Diluted Net Income Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Numerator:      
Net loss attributable to Stratasys Ltd. $ (10,964) $ (39,981) $ (77,219)
Adjustment of redeemable non-controlling interest to redemption amount (935)
Net loss attributable to Stratasys Ltd. for basic loss per share (11,899) (39,981) (77,219)
Adjustment of deferred payments liability revaluation (830)
Net loss attributable to Stratasys Ltd. for diluted loss per share $ (11,899) $ (39,981) $ (78,049)
Denominator:      
Add: Weighted average shares - denominator for basic net loss per share 53,751 52,959 52,330
Add: Shares settlement presumed for deferred payments liability 252
Denominator for diluted loss per share 53,751 52,959 52,582
Net loss per share      
Basic $ (0.22) $ (0.75) $ (1.48)
Diluted $ (0.22) $ (0.75) $ (1.48)