v2.4.0.8
Employee Benefit Plans (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 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 3,352,000 3,374,000 6,704,000 6,950,000
Interest cost 2,030,000 1,334,000 3,689,000 2,684,000
Expected return on plan assets (1,490,000) (1,645,000) (3,187,000) (3,115,000)
Amortization of prior service cost (credit)(1) 0 [1] 77,000 [1] 33,000 [1] 154,000 [1]
Amortization of actuarial loss(1) 930,000 [1] 1,145,000 [1] 1,559,000 [1] 2,167,000 [1]
Settlement cost(1) 1,569,000 [1] 0 [1] 1,569,000 [1] 0 [1]
Net periodic benefit cost (credit) 6,391,000 4,285,000 10,367,000 8,840,000
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 47,000 67,000 114,000 144,000
Interest cost 139,000 91,000 253,000 206,000
Expected return on plan assets 0 0 0 0
Amortization of prior service cost (credit)(1) (928,000) [1] (928,000) [1] (1,856,000) [1] (1,856,000) [1]
Amortization of actuarial loss(1) 262,000 [1] 209,000 [1] 457,000 [1] 517,000 [1]
Settlement cost(1) 0 [1] 0 [1] 0 [1] 0 [1]
Net periodic benefit cost (credit) $ (480,000) $ (561,000) $ (1,032,000) $ (989,000)
[1] These amounts are included in our Consolidated Statements of Comprehensive Income and Consolidated Statements of Cash Flows as changes in employee benefit plan assets and benefit obligations.