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Accumulated Other Comprehensive Income (Loss) (Schedule of Amounts Reclassified From AOCI) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Interest and other expense, net | $ 37 | $ 3,548 | $ 1,392
Reclassification from AOCI |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Interest and other expense, net | $ 1,401 | $ 0 |

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