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Basis of Presentation - Schedule of Income and Expenses of Foreign Operations (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
USD [Member]      
Disclosure Of Basis Of Preparation [Line Items]      
Average exchange rate 19.2357 18.9326 18.6568
Euro [Member]      
Disclosure Of Basis Of Preparation [Line Items]      
Average exchange rate 1.1815 1.1293 1.1066