Pension Health Care And Postretirement Benefits Other Than Pensions (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Significant effect on amounts reported for service and interest rate component and postretirement health care benefit obligation
Effect on total of service and interest cost components, One-Percentage-Point, Increase	$ 117
Effect on total of service and interest cost components, One-Percentage-Point, Decrease	(124)
Effect on the postretirement benefit obligation One-Percentage-Point, Increase	2,938
Effect on the postretirement benefit obligation One-Percentage-Point, Decrease	(3,039)
Retiree health care benefit cash payments
Retiree Health Care Benefits, 2013	20,087
Medicare Prescription Reimbursement, 2013	(2,176)
Expected Cash Payments - Net 2013	17,911
Retiree Health Care Benefits, 2014	21,324
Medicare Prescription Reimbursement, 2014	(2,357)
Expected Cash Payments - Net 2014	18,967
Retiree Health Care Benefits, 2015	22,305
Medicare Prescription Reimbursement, 2015	(2,531)
Expected Cash Payments - Net 2015	19,774
Retiree Health Care Benefits, 2016	23,011
Medicare Prescription Reimbursement, 2016	(2,698)
Expected Cash Payments - Net 2016	20,313
Retiree Health Care Benefits, 2017	23,357
Medicare Prescription Reimbursement, 2017	(680)
Expected Cash Payments - Net 2017	22,677
Retiree Health Care Benefits, 2018 through 2022	114,784
Medicare Prescription Reimbursement, 2018 through 2022	(2,187)
Expected Cash Payments - Net 2018 through 2022	112,597
Retiree Health Care Benefits	224,868
Medicare Prescription Reimbursement	(12,629)
Expected Benefit Cash Payments	$ 212,239

Defined benefit plan expected Medicare prescription reimbursement.

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Defined benefit plan expected Medicare prescription reimbursement in year five.

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Defined benefit plan expected Medicare prescription reimbursement in year five fiscal years thereafter.

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Defined benefit plan expected Medicare prescription reimbursement in year four.

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- Definition

Defined benefit plan expected Medicare prescription reimbursement in year one.

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Defined benefit plan expected Medicare prescription reimbursement in year three.

+ References

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Defined benefit plan expected Medicare prescription reimbursement in year two.

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- Definition

Defined benefit plan expected retiree health care benefit payments in five fiscal years thereafter.

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No definition available.

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Defined benefit plan expected retiree health care benefit payments in year five.

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Defined benefit plan expected retiree health care benefit payments in year four.

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Defined benefit plan expected retiree health care benefit payments in year one.

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Defined benefit plan expected retiree health care benefit payments in year three.

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Defined benefit plan expected retiree health care benefit payments in year two.

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Expected benefit cash payments.

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Expected retiree health care benefit payments.

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- Definition

Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (m)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph m

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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- Definition

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

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