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Equity (Tables)
 9 Months Ended
Sep. 30, 2018
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders Equity [Table Text Block]
A reconciliation of the Company’s equity for the nine months ended September 30, 2018, is as follows:
 
           
Accumulated
    
     
Capital in
     
Other
    
  
Common
  
Excess of
  
Reinvested
  
Comprehensive
  
Noncontrolling
 
  
Stock
  
Par Value
  
Earnings
  
Loss
  
Interest
 
  
(Dollars in thousands)
 
                
Balance, December 31, 2017
 $10,162  $55,884  $150,350  $(17,859) $7,122 
                     
Net earnings  -   -   10,889   -   (398)
Foreign currency translation adjustments  -   -   -   (820)  (472)
Pension liability adjustment, net of tax  -   -   -   352   - 
Cash dividends declared  -   -   (6,975)  -   - 
Cash dividends paid to noncontrolling interest  -   -   -   -   (88)
Purchase of noncontrolling interest  -   3,535   -   (1,111)  (6,164)
Stock options exercised  218   3,391   -   -   - 
Issuance of restricted stock  25   (25)  -   -   - 
Restricted stock forfeited  (4)  4   -   -   - 
Stock-based compensation expense  -   1,149   -   -   - 
Shares purchased and retired  (199)  -   (6,390)  -   - 
                     
Balance, September 30, 2018
 $10,202  $63,938  $147,874  $(19,438) $-