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Fixed Assets (Schedule of Depreciation and Amortization of Fixed Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Property, Plant and Equipment [Abstract] |  |  |
Cost of sales | $ 35,656 | $ 27,042 | $ 22,993
Selling, general and administrative expenses | 10,608 | 7,798 | 5,140
Total | $ 46,264 | $ 34,840 | $ 28,133

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- Definition Selling, General And Administrative Expenses. Depreciation And Amortization + References No definition available. + Details
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- Definition Amount of expense for allocation of cost of tangible and intangible assets over their useful lives directly used in production of good and rendering of service. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(2)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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