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Stock Compensation (Details) - $ / shares
1 Months Ended 3 Months Ended
Nov. 30, 2018
Jun. 30, 2019
Oct. 01, 2018
May 01, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share price (usd per share)     $ 10.51  
Long-Term Incentive Plan 2010 | Common Stock Class A Non-voting        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (shares)       5,085,649
Increase of shares authorized for grant (shares) 400,000      
Non-employee Directors | Long-Term Incentive Plan 2010 | Restricted stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted in period (shares) 59,812 60,088    
Options granted (in dollars per share) $ 9.18 $ 10.64    
Employee | Long-Term Incentive Plan 2010 | Restricted stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted in period (shares) 971,615      
Options granted (in dollars per share) $ 9.18