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Pension and Other Post Retirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2013
Pension and Other Postretirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
                    Other 
                    Postretirement 
 Pension Benefits  Benefits 
 2013  2012 2013 2012 
  Foreign  Domestic  Total  Foreign  Domestic  Total  Domestic  Domestic 
Change in benefit obligation                        
Benefit obligation at beginning of year$81,280 $70,407 $151,687 $61,581 $66,226 $127,807 $7,317 $7,202 
Service cost 2,864  299  3,163  2,004  460  2,464  34  46 
Interest cost 3,150  2,437  5,587  3,020  2,803  5,823  185  283 
Employee contributions 111  0  111  101  0  101  0  0 
Effect of plan amendments (2,138)  0  (2,138)  0  0  0  0  0 
Benefits paid (1,853)  (4,516)  (6,369)  (1,973)  (4,668)  (6,641)  (566)  (728) 
Plan expenses and premiums paid (367)  (225)  (592)  (331)  (225)  (556)  0  0 
Actuarial (gain) loss (566)  (2,033)  (2,599)  14,874  5,811  20,685  (1,331)  514 
Translation difference and other 3,264  0  3,264  2,004  0  2,004  0  0 
Benefit obligation at end of year$85,745 $66,369 $152,114 $81,280 $70,407 $151,687 $5,639 $7,317 
                         
Change in plan assets                        
Fair value of plan assets at beginning of                        
year$60,909 $45,991 $106,900 $54,968 $43,470 $98,438 $0 $0 
Actual return on plan assets 3,237  7,487  10,724  2,972  4,466  7,438  0  0 
Employer contributions 3,947  1,913  5,860  3,842  2,948  6,790  566  728 
Employee contributions 111  0  111  101  0  101  0  0 
Benefits paid (1,853)  (4,516)  (6,369)  (1,973)  (4,668)  (6,641)  (566)  (728) 
Plan expenses and premiums paid (367)  (225)  (592)  (331)  (225)  (556)  0  0 
Translation difference 2,675  0  2,675  1,330  0  1,330  0  0 
Fair value of plan assets at end of year$68,659 $50,650 $119,309 $60,909 $45,991 $106,900 $0 $0 
Net amount recognized$(17,086) $(15,719) $(32,805) $(20,371) $(24,416) $(44,787) $(5,639) $(7,317) 
Amounts recognized in the balance sheet                        
consist of:                        
Current liabilities$(242) $(589) $(831) $(892) $(577) $(1,469) $(607) $(719) 
Non-current liabilities (16,844)  (15,130)  (31,974)  (19,479)  (23,839)  (43,318)  (5,032)  (6,598) 
Net amount recognized$(17,086) $(15,719) $(32,805) $(20,371) $(24,416) $(44,787) $(5,639) $(7,317) 
Amounts not yet reflected in net periodic                        
benefit costs and included in                        
accumulated other comprehensive                        
loss:                        
Prior service credit (cost)$2,105 $(311) $1,794 $(62) $(460) $(522) $0 $0 
Accumulated loss (27,188)  (27,593)  (54,781)  (29,227)  (35,929)  (65,156)  (745)  (2,107) 
Accumulated other comprehensive                        
loss (AOCI) (25,083)  (27,904)  (52,987)  (29,289)  (36,389)  (65,678)  (745)  (2,107) 
Cumulative employer contributions                        
in excess of net period benefit cost 7,997  12,185  20,182  8,918  11,973  20,891  (4,894)  (5,210) 
Net amount recognized$(17,086) $(15,719) $(32,805) $(20,371) $(24,416) $(44,787) $(5,639) $(7,317) 
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]
  2013  2012 
   Foreign  Domestic  Total  Foreign  Domestic  Total 
Projected benefit obligation$85,745 $66,369 $152,114 $81,280 $70,407 $151,687 
Accumulated benefit obligation 84,005  66,369  150,374  75,885  69,951  145,836 
Fair value of plan assets 68,659  50,650  119,309  60,909  45,991  106,900 
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]
  2013  2012 
   Foreign  Domestic  Total  Foreign  Domestic  Total 
Projected benefit obligation$85,745 $66,369 $152,114 $81,280 $70,407 $151,687 
Fair value of plan assets 68,659  50,650  119,309  60,909  45,991  106,900 
Schedule of Net Benefit Costs [Table Text Block]
  2013  2012 
   Foreign  Domestic  Total  Foreign  Domestic  Total 
Service cost$2,864 $299 $3,163 $2,004 $460 $2,464 
Interest cost 3,150  2,437  5,587  3,020  2,803  5,823 
Expected return on plan assets (2,245)  (3,664)  (5,909)  (1,995)  (3,481)  (5,476) 
Actuarial loss amortization 1,486  2,481  3,967  590  2,057  2,647 
Prior service cost amortization 30  148  178  30  82  112 
Net periodic benefit cost$5,285 $1,701 $6,986 $3,649 $1,921 $5,570 

         2011    
         Foreign  Domestic  Total    
  Service cost $1,890 $400 $2,290    
  Interest cost  3,037  3,145  6,182    
  Expected return on plan assets  (2,349)  (3,592)  (5,941)    
  Actuarial loss amortization  233  1,554  1,787    
  Prior service cost amortization  32  82  114    
  Net periodic benefit cost $2,843 $1,589 $4,432    

    2013  2012  2011 
 Interest cost$185 $283 $331 
 Service cost 34  46  16 
 Actuarial loss amortization 32  115  75 
 Net periodic benefit costs$251 $444 $422 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
  2013  2012 
   Foreign  Domestic  Total  Foreign  Domestic  Total 
Net (gain) loss arising during the period$(1,558) $(5,856) $(7,414) $13,897 $4,826 $18,723 
Effect of plan amendment (2,138)  0  (2,138)  0  0  0 
Recognition of amortization in net periodic                  
 benefit cost                  
  Prior service cost (30)  (148)  (178)  (30)  (82)  (112) 
  Actuarial loss (1,486)  (2,481)  (3,967)  (590)  (2,057)  (2,647) 
Effect of exchange rates on amounts included in                  
 AOCI 1,007  0  1,007  809  0  809 
Total recognized in other comprehensive                   
 (income) loss (4,205)  (8,485)  (12,690)  14,086  2,687  16,773 
Total recognized in net periodic benefit cost and                  
 other comprehensive (income) loss$1,080 $(6,784) $(5,704) $17,735 $4,608 $22,343 

     2011    
      Foreign  Domestic  Total    
 Net loss arising during period $5,164 $7,593 $12,757    
 Recognition of amortization in net periodic benefit cost             
  Prior service cost    (32)  (82)  (114)    
  Actuarial loss    (233)  (1,554)  (1,787)    
 Effect of exchange rates on amounts included in AOCI  (794)  0  (794)    
 Total recognized in other comprehensive loss  4,105  5,957  10,062    
 Total recognized in net periodic benefit cost and other             
  comprehensive loss $6,948 $7,546 $14,494    

    2013  2012  2011 
 Net (gain) loss arising during period$(1,331) $514 $(167) 
 Amortization of actuarial loss in net periodic benefit costs (32)  (115)  (75) 
 Total recognized in other comprehensive (income) loss (1,363)  399  (242) 
 Total recognized in net periodic benefit cost and other         
  comprehensive (income) loss$(1,112) $843 $180 
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]
   Pension Plans  Other Postretirement 
    Foreign  Domestic  Total  Benefits 
 Actuarial loss$1,351 $1,819 $3,170 $24 
 Prior service (credit) cost (154)  63  (91)  0 
  $1,197 $1,882 $3,079 $24 
Schedule of Assumptions Used [Table Text Block]
         Other Postretirement 
   Pension Benefits Benefits 
    2013  2012  2013  2012 
 U.S. Plans:            
 Discount rate 4.48%  3.52%  4.05%  3.20% 
 Rate of compensation increase 3.63%  3.40%  N/A  N/A 
               
 Foreign Plans:            
 Discount rate 3.84%  3.94%  N/A  N/A 
 Rate of compensation increase 3.05%  3.60%  N/A  N/A 

         Other Postretirement 
   Pension Benefits Benefits 
    2013  2012  2013  2012 
 U.S. Plans:            
 Discount rate 3.52%  4.41%  3.20%  4.15% 
 Expected long-term return on plan assets 8.25%  8.25%  N/A  N/A 
 Rate of compensation increase 3.40%  3.40%  N/A  N/A 
               
 Foreign Plans:            
 Discount rate 3.94%  4.99%  N/A  N/A 
 Expected long-term return on plan assets 3.57%  3.51%  N/A  N/A 
 Rate of compensation increase 3.60%  3.58%  N/A  N/A 
               

    2013  2012 
 Health care cost trend rate for next year 7.10%  7.30% 
 Rate to which the cost trend rate is assumed to decline (the      
  ultimate trend rate) 4.50%  4.50% 
 Year that the rate reaches the ultimate trend rate 2027  2027 
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
    1% point  1% point 
    Increase  Decrease 
 Effect on total service and interest cost$21 $(18) 
 Effect on postretirement benefit obligations 456  (401) 
Schedule of Allocation of Plan Assets [Table Text Block]
    Target  2013  2012 
 Asset Category         
 U.S. Plans         
 Equity securities 61%  66%  58% 
 Debt securities 32%  32%  40% 
 Other 7%  2%  2% 
  Total 100%  100%  100% 
            
 Foreign Plans         
 Equity securities and other 18%  19%  17% 
 Debt securities 82%  81%  83% 
  Total 100%  100%  100% 

      Fair Value Measurements at December 31, 2013
   Fair Value as of  Using Fair Value Hierarchy
U.S. Pension AssetsDecember 31, 2013 Level 1 Level 2 Level 3
Cash and cash equivalents$825 $825 $0 $0
Large capitalization common stock 14,801  14,801  0  0
Large capitalization registered investment companies 6,820  6,820  0  0
Small capitalization common stock 771  771  0  0
Small capitalization registered investment companies 2,384  2,384  0  0
International developed and emerging markets registered           
 investment companies 5,895  5,895  0  0
International developed and emerging markets common stock 2,929  2,929  0  0
Fixed income corporate securities 10,144  10,144  0  0
Fixed income registered investment companies 4,486  4,486  0  0
U.S. and foreign government fixed income securities 192  192  0  0
Pooled separate accounts 1,403  0  1,403  0
 Total U.S. pension plan assets$50,650 $49,247 $1,403 $0
              
Foreign Pension Assets           
Cash and cash equivalents$5 $5 $0 $0
Insurance contract (underlying notional investments in           
 debt and equity securities) 57,175  0  0  57,175
Diversified equity securities - registered investment companies 6,597  0  6,597  0
Fixed income registered investment companies 4,448  0  4,448  0
Real estate registered investment companies 434  0  0  434
 Total foreign pension assets$68,659 $5 $11,045 $57,609
  Total pension assets at fair value$119,309 $49,252 $12,448 $57,609

      Fair Value Measurements at December 31, 2012
   Fair Value as of Using Fair Value Hierarchy
U.S. Pension AssetsDecember 31, 2012 Level 1 Level 2 Level 3
Cash and cash equivalents$905 $905 $0 $0
Large capitalization common stock 12,195  12,195  0  0
Large capitalization registered investment companies 6,551  6,551  0  0
Small capitalization common stock 539  539  0  0
Small capitalization registered investment companies 1,910  1,910  0  0
International developed and emerging markets registered           
 investment companies 3,107  3,107  0  0
International developed and emerging markets common stock 2,527  2,527  0  0
Fixed income corporate securities 10,297  10,297  0  0
Fixed income registered investment companies 6,483  6,483  0  0
U.S. and foreign government fixed income securities 12  12  0  0
Pooled separate accounts 1,465  0  1,465  0
 Total U.S. pension plan assets$45,991 $44,526 $1,465 $0
              
Foreign Pension Assets           
Cash and cash equivalents$96 $96 $0 $0
Insurance contract (underlying notional investments in           
 debt and equity securities) 51,146  0  0  51,146
Diversified equity securities - registered investment companies 5,072  0  5,072  0
Fixed income registered investment companies 4,207  0  4,207  0
Real estate registered investment companies 388  0  0  388
 Total foreign pension assets$60,909 $96 $9,279 $51,534
  Total pension assets at fair value$106,900 $44,622 $10,744 $51,534
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]
     Insurance  Real Estate    
     Contract  Fund  Total 
 Balance at December 31, 2011 $46,797 $363 $47,160 
  Purchases  2,997  0  2,997 
  Settlements  (1,466)  0  (1,466) 
  Unrealized gains  1,854  10  1,864 
  Currency translation adjustment  964  15  979 
 Balance at December 31, 2012  51,146  388  51,534 
  Purchases  3,182  0  3,182 
  Settlements  (1,607)  0  (1,607) 
  Unrealized gains  2,061  36  2,097 
  Currency translation adjustment  2,393  10  2,403 
 Balance at December 31, 2013 $57,175 $434 $57,609 
Schedule of Expected Benefit Payments [Table Text Block]
             Other 
   Pension Benefits  Postretirement 
    Foreign  Domestic  Total  Benefits 
  2014$1,968 $4,872 $6,840 $607 
  2015 1,901  4,548  6,449  565 
  2016 2,118  4,509  6,627  544 
  2017 2,287  4,408  6,695  528 
  2018 2,483  4,396  6,879  492 
  2019 and beyond 17,822  22,096  39,918  2,043