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RETIREMENT AND DEFERRED COMPENSATION PLANS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Components of net periodic benefit cost:      
Curtailment $ (1,851) $ 0 $ 0
United States      
Change in benefit obligation:      
Benefit obligation at beginning of year 186,013 163,872  
Service cost 9,462 9,638 15,784
Interest cost 8,968 8,631 6,970
Plan Amendment 0 0  
Curtailment/Settlement 0 0  
Prior service cost 0 0  
Actuarial (gain) loss (18,156) 13,989  
Benefits paid (11,093) (10,117)  
Foreign currency translation adjustment (loss) gain 0 0  
Benefit obligation at end of year 175,194 186,013 163,872
Change in plan assets:      
Fair value of plan assets at beginning of year 173,735 162,151  
Actual return on plan assets 17,624 21,207  
Employer contribution 495 494  
Benefits paid (11,093) (10,117)  
Foreign currency translation adjustment 0 0  
Fair value of plan assets at end of year 180,761 173,735 162,151
Funded status at end of year 5,567 (12,278)  
Funded status amounts recognized in Consolidated Balance Sheet      
Non-current assets 19,739 2,528  
Current liabilities (546) (530)  
Non-current liabilities (13,626) (14,276)  
Funded status amount 5,567 (12,278)  
Amounts recognized in accumulated other comprehensive loss      
Net actuarial (gain) loss (21,495) 1,823  
Net prior service cost 0 0  
Tax effects 6,713 1,029  
Net amount recognized (14,782) 2,852  
Changes in benefit obligations and plan assets recognized in other comprehensive income      
Current year actuarial (loss) gain 23,318 (5,161) 54,295
Amortization of net loss 0 0 6,670
Net amount recognized 23,318 (5,161) 60,965
Components of net periodic benefit cost:      
Service cost 9,462 9,638 15,784
Interest cost 8,968 8,631 6,970
Expected return on plan assets (12,463) (12,378) (12,912)
Amortization of net loss 0 0 6,670
Net periodic benefit cost 5,967 5,891 $ 16,512
Accumulated benefit obligation 163,400 171,600  
Projected benefit obligation ("PBO"), ABO, and fair value of plan assets for all pension plans with an ABO in excess of plan assets      
Projected benefit obligation 14,172 14,806  
Accumulated benefit obligation 12,412 12,156  
Fair value of plan assets 0 0  
PBO, ABO, and fair value of plan assets for all pension plans with a PBO in excess of plan assets      
Projected benefit obligation 14,172 14,806  
Accumulated benefit obligation 12,412 12,156  
Fair value of plan assets $ 0 $ 0  
Weighted-average assumptions used to determine benefit obligations      
Discount rate 5.60% 4.95% 5.15%
Rate of compensation increase 3.24% 3.24% 3.20%
Weighted-average assumptions used to determine net periodic benefit cost      
Discount rate 4.95% 5.15% 2.75%
Expected long-term return on plan assets 7.00% 7.00% 7.00%
Rate of compensation increase 3.24% 3.20% 3.17%
Plan assets, actual allocation percentage 100.00% 100.00%  
Plan Assets:      
Total investments $ 180,761 $ 173,735 $ 162,151
United States | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 173,735    
Fair value of plan assets at end of year 180,761 173,735  
Plan Assets:      
Total investments $ 180,761 $ 173,735  
United States | Equity securities      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 50.00% 48.00%  
Target allocation percentage 63.00%    
United States | Fixed income securities      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 25.00% 27.00%  
United States | Corporate debt securities      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 0.00% 0.00%  
United States | Investment Funds      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 0.00% 0.00%  
United States | Infrastructure      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 8.00% 8.00%  
United States | Hedge funds      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 11.00% 11.00%  
United States | Money market      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 2.00% 1.00%  
United States | Real estate      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 4.00% 5.00%  
United States | Fixed income securities and infrastructure      
Weighted-average assumptions used to determine net periodic benefit cost      
Target allocation percentage 37.00%    
United States | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year $ 104,603    
Fair value of plan assets at end of year 109,814 $ 104,603  
Plan Assets:      
Total investments 109,814 104,603  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 1,949    
Fair value of plan assets at end of year 3,054 1,949  
Plan Assets:      
Total investments 3,054 1,949  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 73,483    
Fair value of plan assets at end of year 78,234 73,483  
Plan Assets:      
Total investments 78,234 73,483  
United States | Fair Value, Inputs, Level 1, 2 and 3 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 29,171    
Fair value of plan assets at end of year 28,526 29,171  
Plan Assets:      
Total investments 28,526 29,171  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 104,603    
Fair value of plan assets at end of year 109,814 104,603  
Plan Assets:      
Total investments 109,814 104,603  
United States | Level 1 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 1,949    
Fair value of plan assets at end of year 3,054 1,949  
Plan Assets:      
Total investments 3,054 1,949  
United States | Level 1 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 1,949    
Fair value of plan assets at end of year 3,054 1,949  
Plan Assets:      
Total investments 3,054 1,949  
United States | Level 1 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 73,483    
Fair value of plan assets at end of year 78,234 73,483  
Plan Assets:      
Total investments 78,234 73,483  
United States | Level 1 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 43,156    
Fair value of plan assets at end of year 45,294 43,156  
Plan Assets:      
Total investments 45,294 43,156  
United States | Level 1 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 8,864    
Fair value of plan assets at end of year 10,363 8,864  
Plan Assets:      
Total investments 10,363 8,864  
United States | Level 1 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 21,463    
Fair value of plan assets at end of year 22,577 21,463  
Plan Assets:      
Total investments 22,577 21,463  
United States | Level 1 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 29,171    
Fair value of plan assets at end of year 28,526 29,171  
Plan Assets:      
Total investments 28,526 29,171  
United States | Level 1 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 1 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 2 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Level 3 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
United States | Net Asset Value per Share | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 69,132    
Fair value of plan assets at end of year 70,947 69,132  
Plan Assets:      
Total investments 70,947 69,132  
Foreign Plans      
Change in benefit obligation:      
Benefit obligation at beginning of year 104,757 93,999  
Service cost 6,492 5,915 7,547
Interest cost 3,488 3,642 1,388
Plan Amendment (17) 0  
Curtailment/Settlement (1,385) (606)  
Prior service cost 0 (1,134)  
Actuarial (gain) loss 1,370 6,906  
Benefits paid (3,776) (6,788)  
Foreign currency translation adjustment (loss) gain (6,733) 2,823  
Benefit obligation at end of year 104,196 104,757 93,999
Change in plan assets:      
Fair value of plan assets at beginning of year 72,434 72,523  
Actual return on plan assets 3,605 3,978  
Employer contribution 3,580 477  
Benefits paid (3,776) (6,788)  
Foreign currency translation adjustment (4,593) 2,244  
Fair value of plan assets at end of year 71,250 72,434 72,523
Funded status at end of year (32,946) (32,323)  
Funded status amounts recognized in Consolidated Balance Sheet      
Non-current assets 3,648 1,664  
Current liabilities (46) (32)  
Non-current liabilities (36,548) (33,955)  
Funded status amount (32,946) (32,323)  
Amounts recognized in accumulated other comprehensive loss      
Net actuarial (gain) loss 16,201 15,661  
Net prior service cost (531) (162)  
Tax effects (6,413) (6,463)  
Net amount recognized 9,257 9,036  
Changes in benefit obligations and plan assets recognized in other comprehensive income      
Current year actuarial (loss) gain (47) (5,315) 19,181
Current year prior service cost 20 1,135 (818)
Transfer actuarial gain (loss) (694) 124 17
Amortization of net loss 201 914 1,688
Amortization of prior service cost 349 177 177
Net amount recognized (171) (2,966) 20,245
Components of net periodic benefit cost:      
Service cost 6,492 5,915 7,547
Interest cost 3,488 3,642 1,388
Expected return on plan assets (2,243) (2,340) (2,728)
Amortization of net loss 201 914 1,688
Amortization of prior service cost 349 177 177
Net periodic benefit cost 8,287 8,308 8,072
Curtailment (2,205) (1) (24)
Total Net periodic benefit cost 6,082 8,307 $ 8,048
Accumulated benefit obligation 80,200 80,100  
Projected benefit obligation ("PBO"), ABO, and fair value of plan assets for all pension plans with an ABO in excess of plan assets      
Projected benefit obligation 77,645 56,881  
Accumulated benefit obligation 54,460 40,312  
Fair value of plan assets 41,238 29,372  
PBO, ABO, and fair value of plan assets for all pension plans with a PBO in excess of plan assets      
Projected benefit obligation 81,273 81,534  
Accumulated benefit obligation 57,494 56,969  
Fair value of plan assets $ 44,676 $ 47,544  
Weighted-average assumptions used to determine benefit obligations      
Discount rate 3.33% 3.20% 3.69%
Rate of compensation increase 3.21% 3.20% 3.21%
Weighted-average assumptions used to determine net periodic benefit cost      
Discount rate 3.32% 3.69% 1.20%
Expected long-term return on plan assets 3.22% 3.23% 3.53%
Rate of compensation increase 3.21% 3.20% 3.20%
Plan assets, actual allocation percentage 100.00% 100.00%  
Plan Assets:      
Total investments $ 71,250 $ 72,434 $ 72,523
Foreign Plans | Equity securities      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 3.00% 3.00%  
Foreign Plans | Fixed income securities      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 1.00% 1.00%  
Foreign Plans | Corporate debt securities      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 2.00% 1.00%  
Foreign Plans | Investment Funds      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 94.00% 94.00%  
Target allocation percentage 100.00%    
Foreign Plans | Infrastructure      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 0.00% 0.00%  
Foreign Plans | Hedge funds      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 0.00% 0.00%  
Foreign Plans | Money market      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 0.00% 1.00%  
Foreign Plans | Real estate      
Weighted-average assumptions used to determine net periodic benefit cost      
Plan assets, actual allocation percentage 0.00% 0.00%  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year $ 72,434    
Fair value of plan assets at end of year 71,250 $ 72,434  
Plan Assets:      
Total investments 71,250 72,434  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 514    
Fair value of plan assets at end of year 275 514  
Plan Assets:      
Total investments 275 514  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 2,106    
Fair value of plan assets at end of year 1,873 2,106  
Plan Assets:      
Total investments 1,873 2,106  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 831    
Fair value of plan assets at end of year 562 831  
Plan Assets:      
Total investments 562 831  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 1,231    
Fair value of plan assets at end of year 1,213 1,231  
Plan Assets:      
Total investments 1,213 1,231  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 67,752    
Fair value of plan assets at end of year 67,327 67,752  
Plan Assets:      
Total investments 67,327 67,752  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 1 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 28,195    
Fair value of plan assets at end of year 28,300 28,195  
Plan Assets:      
Total investments 28,300 28,195  
Foreign Plans | Level 1 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 514    
Fair value of plan assets at end of year 275 514  
Plan Assets:      
Total investments 275 514  
Foreign Plans | Level 1 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 1 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 506    
Fair value of plan assets at end of year 269 506  
Plan Assets:      
Total investments 269 506  
Foreign Plans | Level 1 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 8    
Fair value of plan assets at end of year 6 8  
Plan Assets:      
Total investments 6 8  
Foreign Plans | Level 1 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 2,106    
Fair value of plan assets at end of year 1,873 2,106  
Plan Assets:      
Total investments 1,873 2,106  
Foreign Plans | Level 1 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 1 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 1 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 2,106    
Fair value of plan assets at end of year 1,873 2,106  
Plan Assets:      
Total investments 1,873 2,106  
Foreign Plans | Level 1 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 831    
Fair value of plan assets at end of year 562 831  
Plan Assets:      
Total investments 562 831  
Foreign Plans | Level 1 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 1,231    
Fair value of plan assets at end of year 1,213 1,231  
Plan Assets:      
Total investments 1,213 1,231  
Foreign Plans | Level 1 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 1,231    
Fair value of plan assets at end of year 1,213 1,231  
Plan Assets:      
Total investments 1,213 1,231  
Foreign Plans | Level 1 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 23,513    
Fair value of plan assets at end of year 24,377 23,513  
Plan Assets:      
Total investments 24,377 23,513  
Foreign Plans | Level 1 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 5,411    
Fair value of plan assets at end of year 5,781 5,411  
Plan Assets:      
Total investments 5,781 5,411  
Foreign Plans | Level 1 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 17,256    
Fair value of plan assets at end of year 14,634 17,256  
Plan Assets:      
Total investments 14,634 17,256  
Foreign Plans | Level 1 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 846    
Fair value of plan assets at end of year 3,962 846  
Plan Assets:      
Total investments 3,962 846  
Foreign Plans | Level 2 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 44,239    
Fair value of plan assets at end of year 42,950 44,239  
Plan Assets:      
Total investments 42,950 44,239  
Foreign Plans | Level 2 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 44,239    
Fair value of plan assets at end of year 42,950 44,239  
Plan Assets:      
Total investments 42,950 44,239  
Foreign Plans | Level 2 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 2 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 44,239    
Fair value of plan assets at end of year 42,950 44,239  
Plan Assets:      
Total investments 42,950 44,239  
Foreign Plans | Level 3 | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Cash and Short Term Securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Cash and Short Term Securities | USD | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Cash and Short Term Securities | EUR | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Cash and Short Term Securities | Others | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Equity securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | U.S. Large Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | U.S. Small Cap Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | International Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Fixed income securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Corporate debt securities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Euro Corporate Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Investment Funds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Mutual Funds in Equities | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Mutual Funds in Bonds | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments 0 0  
Foreign Plans | Level 3 | Mutual Funds Diversified | Fair Value, Recurring      
Change in plan assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Plan Assets:      
Total investments $ 0 $ 0