Employee Benefits Plans (Details 2) (Pension Plans [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Pension Plans [Member]
Change in benefit obligations:
Benefit obligations at January 1	$ 1,967,586	$ 1,744,233
Interest Cost	94,605	97,526
Actuarial loss	189,936	187,390
Benefits paid	(76,742)	(71,910)
Foreign currency exchange rate changes	16,557	(4,372)
Benefit obligations at December 31	2,207,421	1,967,586
Change in plan assets:
Fair value of plan assets at January 1	1,418,042	1,428,784
Actual return on plan assets	174,650	(1,431)
Employer contribution	81,116	65,224
Participants' contributions	52	61
Benefits paid	(76,742)	(71,910)
Foreign currency exchange rate changes	15,809	(2,686)
Fair value of plan assets at December 31	1,612,927	1,418,042
Funded status	$ (594,494)	$ (549,544)

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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