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Equity Share Repurchase (Policies)
 6 Months Ended
Jun. 30, 2019
Equity [Abstract]  
Share Repurchase and Retirement [Policy Text Block] All of the shares repurchased were treated as retirements and reduced the number of shares issued and outstanding. In addition, the Company recorded the excess of the purchase price over the par value per share as a reduction to additional paid-in capital.