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Changes in Shareholders' Equity (Tables)
3 Months Ended
Mar. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of Activity in Shareholders' Equity

The following table summarizes changes in Shareholders’ Equity:

 

(in thousands)  Common Stock Class
 A and B
  Additional paid in capital  Retained earnings  Accumulated items of other comprehensive income/(loss)  Treasury stock  Noncontrolling Interest  Total Equity
December 31, 2016  $40   $425,953   $522,855   ($184,189)  ($257,136)  $3,767   $511,290 
Net income  -   -   10,839   -   -   135   10,974 
Compensation and benefits paid or payable in shares  -   989   -   -   -   -   989 
Options exercised  -   75   -   -   -   -   75 
Dividends declared  -   -   (5,467)  -   -   -   (5,467)
Cumulative translation adjustments  -   -   -   10,126   -   5   10,131 
Pension and postretirement liability adjustments  -   -   -   (29)  -   -   (29)
Derivative valuation adjustment  -   -   -   630   -   -   630 
March 31, 2017  $40   $427,017   $528,227   ($173,462)  ($257,136)  $3,907   $528,593