Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Amortization of:
Contribution to pension plans	$ 4,300,000
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	75,000,000
Pension Benefits [Member]
Amortization of:
Net periodic benefit cost	8,134,000	10,621,000
Postretirement Benefits [Member]
Amortization of:
Net periodic benefit cost	(244,000)	598,000
Company Administered Plan [Member] | Pension Benefits [Member]
Components of net periodic benefit cost
Service cost	3,423,000	4,252,000
Interest Cost	25,561,000	22,419,000
Expected Return on Plan Assets	(28,718,000)	(26,448,000)
Amortization of:
Net actuarial loss (credit)	6,235,000	8,880,000
Prior service credit	(458,000)	(466,000)
Net periodic benefit cost	6,043,000	8,637,000
Company Administered Plan [Member] | Pension Benefits U.S. [Member]
Amortization of:
Net periodic benefit cost	6,287,000	8,741,000
Company Administered Plan [Member] | Pension Benefits Non-U.S. [Member]
Amortization of:
Net periodic benefit cost	(244,000)	(104,000)
Company Administered Plan [Member] | Postretirement Benefits [Member]
Components of net periodic benefit cost
Service cost	135,000	263,000
Interest Cost	365,000	395,000
Amortization of:
Net actuarial loss (credit)	(129,000)	(2,000)
Prior service credit	(615,000)	(58,000)
Net periodic benefit cost	(244,000)	598,000
Company Administered Plan [Member] | Postretirement Benefits U.S [Member]
Amortization of:
Net periodic benefit cost	(397,000)	406,000
Company Administered Plan [Member] | Postretirement Benefits Non-U.S [Member]
Amortization of:
Net periodic benefit cost	153,000	192,000
Union Administered Plan [Member] | Pension Benefits [Member]
Amortization of:
Net periodic benefit cost	$ 2,091,000	$ 1,984,000