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Employee Benefit Plans (Details 3)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
market
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
shares
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Dividends paid $ 53,382 $ 66,321 $ 66,228    
U.S. Plans          
Defined Benefit Plan Disclosure [Line Items]          
Accumulated benefit obligation       $ 307,400 $ 325,300
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]          
Projected benefit obligation       297,500 314,900
Accumulated benefit obligation       297,500 314,900
Fair value of plan assets       198,800 $ 222,300
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Number of capital market results simulated in the model for expected return on plan assets | market 1,000        
Period for which results of capital markets are simulated 20 years        
Expected long-term rates of return on plan assets for next year (as a percent) 7.30%        
Expected long-term rates of return on plan assets 7.50% 7.50% 7.50%    
Number of shares of Company's common stock included in plan assets | shares         450,000
Value of shares of Company's common stock included in plan assets       3,500 $ 8,500
Dividends paid $ 400 $ 400      
Fair values of plan assets 233,350 233,579 $ 233,579 $ 208,870 $ 233,350
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 233,350 233,579      
Employer contributions 2,289 7,598      
Fair value of plan assets at end of year $ 208,870 233,350 $ 233,579    
U.S. Plans | Equity securities | United States          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       37.20% 39.10%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation - Minimum 32.00%        
Target Long-Term Allocation - Maximum 42.00%        
Fair values of plan assets $ 44,064 44,064   $ 35,619 $ 44,064
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 44,064        
Fair value of plan assets at end of year $ 35,619 44,064      
U.S. Plans | Equity securities | International          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       18.50% 18.20%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation - Minimum 15.00%        
Target Long-Term Allocation - Maximum 25.00%        
U.S. Plans | Harsco common stock          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       1.70% 3.60%
U.S. Plans | Mutual funds - equities | United States          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets $ 47,313 47,313   $ 42,093 $ 47,313
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 47,313        
Fair value of plan assets at end of year 42,093 47,313      
U.S. Plans | Mutual funds - equities | International          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 42,446 42,446   $ 38,787 $ 42,446
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 42,446        
Fair value of plan assets at end of year $ 38,787 42,446      
U.S. Plans | Fixed income securities          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       32.60% 30.30%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation - Minimum 28.00%        
Target Long-Term Allocation - Maximum 38.00%        
U.S. Plans | U.S. Treasuries and collateralized securities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets $ 18,759 18,759   $ 15,506 $ 18,759
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 18,759        
Fair value of plan assets at end of year 15,506 18,759      
U.S. Plans | Corporate bonds and notes          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 11,347 11,347   12,987 11,347
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 11,347        
Fair value of plan assets at end of year 12,987 11,347      
U.S. Plans | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 40,568 40,568   $ 39,594 $ 40,568
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 40,568        
Fair value of plan assets at end of year $ 39,594 40,568      
U.S. Plans | Other          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       10.00% 9.30%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation - Minimum 5.00%        
Target Long-Term Allocation - Maximum 15.00%        
U.S. Plans | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets $ 21,700 21,700   $ 20,803 $ 21,700
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 21,700        
Fair value of plan assets at end of year $ 20,803 21,700      
U.S. Plans | Cash and cash equivalents          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       1.70% 3.10%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation - Maximum 5.00%        
Fair values of plan assets $ 7,153 7,153   $ 3,481 $ 7,153
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 7,153        
Fair value of plan assets at end of year 3,481 7,153      
U.S. Plans | Level 1          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 151,981 151,981   135,366 151,981
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 151,981        
Fair value of plan assets at end of year 135,366 151,981      
U.S. Plans | Level 1 | Equity securities | United States          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 44,064 44,064   35,619 44,064
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 44,064        
Fair value of plan assets at end of year 35,619 44,064      
U.S. Plans | Level 1 | Mutual funds - equities | United States          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 13,335 13,335   11,595 13,335
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 13,335        
Fair value of plan assets at end of year 11,595 13,335      
U.S. Plans | Level 1 | Mutual funds - equities | International          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 42,446 42,446   38,787 42,446
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 42,446        
Fair value of plan assets at end of year 38,787 42,446      
U.S. Plans | Level 1 | U.S. Treasuries and collateralized securities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
U.S. Plans | Level 1 | Corporate bonds and notes          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 11,347 11,347   12,987 11,347
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 11,347        
Fair value of plan assets at end of year 12,987 11,347      
U.S. Plans | Level 1 | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 11,936 11,936   12,094 11,936
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 11,936        
Fair value of plan assets at end of year 12,094 11,936      
U.S. Plans | Level 1 | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 21,700 21,700   20,803 21,700
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 21,700        
Fair value of plan assets at end of year 20,803 21,700      
U.S. Plans | Level 1 | Cash and cash equivalents          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 7,153 7,153   3,481 7,153
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 7,153        
Fair value of plan assets at end of year 3,481 7,153      
U.S. Plans | Level 2          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 81,369 81,369   73,504 81,369
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 81,369        
Fair value of plan assets at end of year 73,504 81,369      
U.S. Plans | Level 2 | Equity securities | United States          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
U.S. Plans | Level 2 | Mutual funds - equities | United States          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 33,978 33,978   30,498 33,978
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 33,978        
Fair value of plan assets at end of year 30,498 33,978      
U.S. Plans | Level 2 | Mutual funds - equities | International          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
U.S. Plans | Level 2 | U.S. Treasuries and collateralized securities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 18,759 18,759   15,506 18,759
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 18,759        
Fair value of plan assets at end of year 15,506 18,759      
U.S. Plans | Level 2 | Corporate bonds and notes          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
U.S. Plans | Level 2 | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 28,632 28,632   27,500 28,632
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 28,632        
Fair value of plan assets at end of year 27,500 28,632      
U.S. Plans | Level 2 | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
U.S. Plans | Level 2 | Cash and cash equivalents          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year $ 0 $ 0      
International Plans          
Defined Benefit Plan Disclosure [Line Items]          
Accumulated benefit obligation       894,800 1,043,200
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]          
Projected benefit obligation       876,900 1,032,100
Accumulated benefit obligation       871,900 1,026,000
Fair value of plan assets       731,600 771,800
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Expected long-term rates of return on plan assets for next year (as a percent) 6.50%        
Expected long-term rates of return on plan assets 6.80% 6.80% 6.60%    
Fair values of plan assets $ 791,045 $ 770,911 $ 770,911 $ 755,966 $ 791,045
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 791,045 770,911      
Employer contributions 27,402 28,112      
Fair value of plan assets at end of year $ 755,966 $ 791,045 770,911    
International Plans | United Kingdom          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Expected long-term rates of return on plan assets for next year (as a percent) 6.60% 6.80%      
Pension plan assets as a percentage of international plan assets       95.00%  
International Plans | International, other than UK          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Pension plan assets as a percentage of international plan assets       5.00%  
International Plans | Equity securities          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       33.70% 36.90%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation 32.50%        
International Plans | Mutual funds - equities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets $ 292,150 $ 292,150   $ 255,937 $ 292,150
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 292,150        
Fair value of plan assets at end of year $ 255,937 292,150      
International Plans | Fixed income securities          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       43.30% 45.30%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation 42.50%        
International Plans | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets $ 350,073 350,073   $ 320,259 $ 350,073
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 350,073        
Fair value of plan assets at end of year 320,259 350,073      
International Plans | Insurance contracts          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 8,233 8,233   $ 7,306 $ 8,233
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 8,233        
Fair value of plan assets at end of year $ 7,306 8,233      
International Plans | Other          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       22.70% 17.50%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation 25.00%        
International Plans | Real estate funds / limited partnerships          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets $ 53,926 53,926   $ 52,313 $ 53,926
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 53,926        
Fair value of plan assets at end of year 52,313 53,926      
International Plans | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 84,120 84,120   $ 117,646 $ 84,120
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 84,120        
Fair value of plan assets at end of year $ 117,646 84,120      
International Plans | Cash and cash equivalents          
Defined Benefit Plan, Information about Plan Assets [Abstract]          
Percentage of Plan Assets at December 31       0.30% 0.30%
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Target Long-Term Allocation 0.00%        
Fair values of plan assets $ 2,543 2,543   $ 2,505 $ 2,543
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 2,543        
Fair value of plan assets at end of year 2,505 2,543      
International Plans | Level 1          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 2,543 2,543   2,505 2,543
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 2,543        
Fair value of plan assets at end of year 2,505 2,543      
International Plans | Level 1 | Mutual funds - equities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 1 | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 1 | Insurance contracts          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 1 | Real estate funds / limited partnerships          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 1 | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 1 | Cash and cash equivalents          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 2,543 2,543   2,505 2,543
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 2,543        
Fair value of plan assets at end of year 2,505 2,543      
International Plans | Level 2          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 765,855 765,855   729,099 765,855
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 765,855        
Fair value of plan assets at end of year 729,099 765,855      
International Plans | Level 2 | Mutual funds - equities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 292,150 292,150   255,937 292,150
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 292,150        
Fair value of plan assets at end of year 255,937 292,150      
International Plans | Level 2 | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 350,073 350,073   320,259 350,073
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 350,073        
Fair value of plan assets at end of year 320,259 350,073      
International Plans | Level 2 | Insurance contracts          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 8,233 8,233   7,306 8,233
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 8,233        
Fair value of plan assets at end of year 7,306 8,233      
International Plans | Level 2 | Real estate funds / limited partnerships          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 31,279 31,279   27,951 31,279
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 31,279        
Fair value of plan assets at end of year 27,951 31,279      
International Plans | Level 2 | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 84,120 84,120   117,646 84,120
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 84,120        
Fair value of plan assets at end of year 117,646 84,120      
International Plans | Level 2 | Cash and cash equivalents          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 3          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 22,647 22,647   24,362 22,647
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 22,647        
Fair value of plan assets at end of year 24,362 22,647      
International Plans | Level 3 | Mutual funds - equities          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 3 | Mutual funds - bonds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 3 | Insurance contracts          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 3 | Real estate funds / limited partnerships          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 22,647 20,423 17,746 24,362 22,647
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 22,647 20,423 17,746    
Employer contributions 109 385 838    
Cash distributions received (10,062) (1,614) (1,380)    
Actual return on plan assets - related to asset still held at end of year 11,668 3,453 3,219    
Fair value of plan assets at end of year 24,362 22,647 $ 20,423    
International Plans | Level 3 | Other mutual funds          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   0 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year 0 0      
International Plans | Level 3 | Cash and cash equivalents          
Defined Benefit Plan, Assets, Target Allocations [Abstract]          
Fair values of plan assets 0 0   $ 0 $ 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Fair value of plan assets at beginning of year 0        
Fair value of plan assets at end of year $ 0 $ 0