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Stockholders’ Equity - Treasury Stock (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
Nov. 08, 2017
Stockholders’ Equity        
Treasury stock, shares authorized       5,000,000
Treasury stock purchases (in shares)   237,962    
Share Repurchased (in shares) 0      
Treasury shares 2,787,147 2,787,147 2,549,185