Retirement Plans (OPEB Expected Benefit Payments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
OPEB, Gross Benefits [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2014	$ 16,687
2015	18,004
2016	19,342
2017	20,575
2018	21,785
2019 - 2023	120,619
Total	217,012
Medicare Part D Subsidy [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2014	489
2015	585
2016	691
2017	825
2018	961
2019 - 2023	6,994
Total	10,545
Postretirement Benefits Other Than Pensions (OPEB) [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2014	16,198
2015	17,419
2016	18,651
2017	19,750
2018	20,824
2019 - 2023	113,625
Total	$ 206,467

The total amount of the aggregate benefits expected to be paid in the next ten fiscal years.

No definition available.

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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.

+ 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 (f)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

+ Details

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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.

+ References

+ Details

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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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

+ References

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