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Multiemployer Plans - Narrative (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
plan
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Multiemployer Plans [Line Items]      
Withdrawal liability $ 0 $ 0 $ 0
Minimum | Multiemployer Plans, Pension      
Multiemployer Plans [Line Items]      
Number of plans | plan 200    
Domestic      
Multiemployer Plans [Line Items]      
Benefit obligation $ 7,000,000 7,000,000  
Domestic | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Available      
Multiemployer Plans [Line Items]      
Contributions 167,297,000 147,056,000 137,991,000
Domestic | Multiemployer Plans, Postretirement Benefit | Multiemployer Plan, Plan Information, Not Available      
Multiemployer Plans [Line Items]      
Contributions $ 130,500,000 $ 108,100,000 98,300,000
Domestic | Minimum      
Multiemployer Plans [Line Items]      
Discount rate 3.80% 3.80%  
Domestic | Minimum | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Available      
Multiemployer Plans [Line Items]      
Contributions $ 2,000,000    
UK Plan | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Not Available      
Multiemployer Plans [Line Items]      
Number of plans | plan 2    
Contributions $ 200,000 $ 200,000 200,000
Red Zone | Domestic | Minimum | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Available      
Multiemployer Plans [Line Items]      
Contributions 500,000    
Orange or Yellow Zones | Domestic | Minimum | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Available      
Multiemployer Plans [Line Items]      
Contributions $ 1,000,000    
UK Plan 1 | UK Plan | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Not Available      
Multiemployer Plans [Line Items]      
Multiemployer Plans, Funded Status At least 80 percent    
UK Plan 2 | UK Plan | Multiemployer Plans, Pension | Multiemployer Plan, Plan Information, Not Available      
Multiemployer Plans [Line Items]      
Multiemployer Plans, Funded Status Between 65 and less than 80 percent    
United Kingdom Subsidiary | UK Plan      
Multiemployer Plans [Line Items]      
Benefit obligation $ 306,731,000 $ 295,825,000 332,806,000
Discount rate 2.70% 3.80%  
Selling, General and Administrative Expenses | Domestic      
Multiemployer Plans [Line Items]      
Reclassification adjustment from AOCI, net of income taxes $ 200,000 $ 200,000 200,000
Selling, General and Administrative Expenses | United Kingdom Subsidiary | UK Plan      
Multiemployer Plans [Line Items]      
Reclassification adjustment from AOCI, net of income taxes $ 1,700,000 $ 2,000,000 $ 1,600,000