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RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Details 6) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
hours
M
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2006
Minimum
Dec. 31, 2006
Maximum
Dec. 31, 2011
Supplemental executive retirement plan (SERP)
Dec. 31, 2010
Supplemental executive retirement plan (SERP)
Dec. 31, 2009
Supplemental executive retirement plan (SERP)
Retirement Annuity and Guaranteed Continuous Employment Plans                
Total net pension costs $ 26,370 $ 29,123 $ 34,774     $ 2,110 $ 2,118 $ 2,088
Projected benefit obligation 991,979 851,948 777,521     23,930 21,412 20,442
Percentage of base pay as additional annual Company contribution to participants hired after November 1, 1997 2.00%     4.00% 10.00%      
Defined Contribution Plans - 401 (k) savings plan                
Minimum percentage of eligible compensation that may be invested by all U.S. employees covered under the plan 1.00%              
Employer match of employee contributions of first 6% of eligible compensation (as a percent) 35.00%              
Percentage of eligible compensation, matched 35% by employer 6.00%              
Annual costs recognized for defined contribution plans 8,478 7,039 4,810          
Multi-Employer Plans                
Annual pension costs of multi-employer plans for operations in Europe $ 966 $ 1,052 $ 1,322          
Other Benefits                
Minimum percentage of every standard work week for which, the Company will provide work to employees in Cleveland, Ohio, area operations, covered under the guaranteed continuous employment plan 75.00%              
Hours in a standard work week under Guaranteed Continuous Employment Plan 40              
Minimum notice period for the termination of Guaranteed Continuous Employment Plan (in months) 6