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Changes in Shareholders' Equity (Tables)
9 Months Ended
Sep. 30, 2016
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, 2015  $40   $423,108   $491,950   ($158,844)  ($257,391)  $3,690   $502,553 
Net income  -   -   36,937   -   -   (111)  36,826 
Compensation and benefits paid or payable in shares  -   1,447   -   -   -   -   1,447 
Options exercised  -   570   -   -   -   -   570 
Shares issued to Directors'  -   190   -   -   245   -   435 
Dividends declared  -   -   (16,370)  -   -   -   (16,370)
Cumulative translation adjustments  -   -   -   2,216   -   (1)  2,215 
Pension and postretirement liability adjustments  -   -   -   702   -   -   702 
Derivative valuation adjustment  -   -   -   (3,255)  -   -   (3,255)
September 30, 2016  $40   $425,315   $512,517   ($159,181)  ($257,146)  $3,578   $525,123