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Reclassifications
6 Months Ended
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Reclassifications [Text Block]
4.
Reclassifications
 
Certain prior year amounts in the Consolidated Condensed Statements of Cash Flows (Unaudited) were reclassified to conform to current year presentation. These reclassifications had no effect on previously reported net earnings or equity.