Consolidated Statement of Shareholders' Equity - USD ($)
shares in Thousands
Total
Common Stock
Additional Paid-in- Capital
Retained Earnings
Accumulated Other Comprehensive Earnings
Treasury Stock
Class B Common Shares
Stock Issued During Period, Deferred Equity Compensation $ 69,000   $ 69,000        
Beginning Balance at Dec. 31, 2013 670,809,000 $ 8,539,000 234,620,000 $ 396,016,000 $ 125,156,000 $ (93,794,000) $ 272,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Exercise of stock options 480,000 8,000 472,000        
Non-qualified stock option expense 3,356,000   3,356,000        
Restricted stock awards 1,799,000 44,000 2,226,000     (471,000)  
Net loss (56,070,000)     (56,070,000)      
Foreign currency translation adjustments (51,508,000)       (51,508,000)    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent (51,508,000)            
Unrealized gain on cash flow hedges 158,000       158,000    
Defined benefit plans:              
Amortization of prior service costs and unrecognized losses and credits (2,187,000)       (2,187,000)    
Comprehensive Loss (109,607,000)            
Dividends (1,584,000)     (1,584,000)      
Ending Balance at Dec. 31, 2014 565,322,000 8,591,000 240,743,000 338,362,000 71,619,000 (94,265,000) 272,000
Defined benefit plans:              
Proceeds from Issuance of Warrants 0            
Payments of Ordinary Dividends, Common Stock 1,584,000            
Exercise of stock options 2,402,000 43,000 2,359,000        
Non-qualified stock option expense 1,228,000   1,228,000        
Restricted stock awards 2,651,000 93,000 2,692,000     (134,000)  
Conversion from Class B to Common Stock 0 (88,000)         (88,000)
Net loss (26,190,000)     (26,190,000)      
Foreign currency translation adjustments (81,404,000)            
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent (81,404,000)            
Unrealized gain on cash flow hedges 2,554,000       2,554,000    
Amortization of prior service costs and unrecognized losses and credits (1,372,000)       (1,372,000)    
Amounts arising during the year, primarily due to the addition of new participants (784,000)       (784,000)    
Comprehensive Loss (107,196,000)            
Dividends (1,589,000)            
Ending Balance at Dec. 31, 2015 462,818,000 8,815,000 247,022,000 310,583,000 (9,387,000) (94,399,000) 184,000
Defined benefit plans:              
Proceeds from Issuance of Warrants 0            
Payments of Ordinary Dividends, Common Stock 1,589,000            
Stock Issued During Period, Deferred Equity Compensation 0 69,000 (69,000)        
Exercise of stock options 17,000   17,000        
Stock-based compensation expense 1,110,000   1,110,000        
Non-qualified stock option expense 745,000   745,000        
Restricted stock awards 4,708,000 89,000 4,950,000     (331,000)  
Conversion from Class B to Common Stock 0 (1,000)         (1,000)
Net loss (42,856,000)     (42,856,000)      
Foreign currency translation adjustments (7,194,000)       (7,194,000)    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent (7,194,000)            
Unrealized gain on cash flow hedges (1,263,000)       (1,263,000)    
Amortization of prior service costs and unrecognized losses and credits (1,491,000)       (1,491,000)    
Comprehensive Loss (52,804,000)            
Dividends (1,583,000)            
Ending Balance at Dec. 31, 2016 422,387,000 $ 8,974,000 266,151,000 $ 266,144,000 $ (19,335,000) $ (99,730,000) $ 183,000
Defined benefit plans:              
Proceeds from Issuance of Warrants 12,376,000            
Adjustments to Additional Paid in Capital, Warrant Issued 12,376,000   $ 12,376,000        
Payments of Ordinary Dividends, Common Stock $ 1,583,000            
Treasury Stock, Shares, Acquired (5,000)         (5,000) 0