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Employee Benefit Plans (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Defined benefit plans:    
Multiemployer pension plans $ 701,000 $ 2,816,000
Defined contribution pension plans 4,069,000 4,828,000
U. S. Plans
   
Defined benefit plans:    
Service cost 558,000 641,000
Interest cost 3,217,000 2,941,000
Expected return on plan assets (4,196,000) (3,909,000)
Recognized prior service costs 22,000 35,000
Recognized loss 838,000 1,263,000
Defined benefit plans net periodic pension cost 439,000 971,000
Defined benefit pension plan 566,000 483,000
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year 9,200,000  
International Plans
   
Defined benefit plans:    
Service cost 407,000 909,000
Interest cost 10,912,000 10,781,000
Expected return on plan assets (12,588,000) (11,819,000)
Recognized prior service costs 46,000 92,000
Recognized loss 3,553,000 4,150,000
Defined benefit plans net periodic pension cost 2,330,000 4,113,000
Defined benefit pension plan 17,421,000 17,559,000
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year $ 13,300,000