v2.4.0.8
Employee Benefit Plans (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]        
Number of Union Pension Plans     2  
Pension Benefits
        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year     $ 21,100,000  
Components of net periodic benefit costs:        
Service cost 3,348,000 3,476,000 10,052,000 10,426,000
Interest cost 1,332,000 1,342,000 5,021,000 4,026,000
Expected return on plan assets (1,588,000) (1,556,000) (4,775,000) (4,671,000)
Amortization of prior service cost (credit)(1) 0 [1] 76,000 [1] 33,000 [1] 230,000 [1]
Amortization of actuarial loss(1) 756,000 [1] 1,084,000 [1] 2,315,000 [1] 3,251,000 [1]
Settlement cost(1) 30,000 [1] 0 [1] 1,599,000 [1] 0 [1]
Net periodic benefit cost (credit) 3,878,000 4,422,000 14,245,000 13,262,000
Other Post-Retirement Benefits
        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year     700,000  
Components of net periodic benefit costs:        
Service cost 57,000 72,000 171,000 216,000
Interest cost 126,000 103,000 379,000 309,000
Expected return on plan assets 0 0 0 0
Amortization of prior service cost (credit)(1) (928,000) [1] (928,000) [1] (2,784,000) [1] (2,784,000) [1]
Amortization of actuarial loss(1) 229,000 [1] 259,000 [1] 686,000 [1] 776,000 [1]
Settlement cost(1) 0 [1] 0 [1] 0 [1] 0 [1]
Net periodic benefit cost (credit) $ (516,000) $ (494,000) $ (1,548,000) $ (1,483,000)
[1] These amounts are included in our Consolidated Statements of Comprehensive Income and cumulatively in our Consolidated Statements of Cash Flows as changes in employee benefit plan assets and benefit obligations.