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Retirement Plans and Other Post-Retirement Benefits (Details 10)	12 Months Ended
	Dec. 31, 2012
Large cap [Member]
Schedule of target allocation for the plan assets
Target allocation for the plan assets	39.00%
Small and mid cap [Member]
Schedule of target allocation for the plan assets
Target allocation for the plan assets	13.00%
International equity [Member]
Schedule of target allocation for the plan assets
Target allocation for the plan assets	13.00%
Real Estate Investment Trusts (REIT) [Member]
Schedule of target allocation for the plan assets
Target allocation for the plan assets	5.00%
Fixed income, cash and cash equivalents [Member]
Schedule of target allocation for the plan assets
Target allocation for the plan assets	30.00%

X

- Details

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X

- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ 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 (d)(i)

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



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920

+ Details

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