Employee Benefit Plans (Details 11)	12 Months Ended
Dec. 31, 2014
Equity based
Percentage of Total Portfolio Market Value
Equity Securities, Single Securities (less than 5%)	5.00%
Equity Securities, Minimum	0.00%
Equity Securities, Maximum	70.00%
Fixed income securities
Percentage of Total Portfolio Market Value
Equity Securities, Single Securities (less than 5%)	5.00%
Equity Securities, Minimum	20.00%
Equity Securities, Maximum	100.00%
Cash and equivalents
Percentage of Total Portfolio Market Value
Cash and equivalents, Single securities (less than 5%)	5.00%
Cash and equivalents, Minimum	1.00%
Cash and equivalents, Maximum	100.00%
Alternative investments
Percentage of Total Portfolio Market Value
Alternative Investments, Single securities (less than 5%)	5.00%
Alternative Investments, Minimum	0.00%
Alternative Investments, Maximum	20.00%

Defined benefit plan target allocation percentage of assets alternative investment range minimum.

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Defined benefit plan target allocation percentage of assets alternative investments.

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Defined benefit plan target allocation percentage of assets cash and cash equivalents.

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Defined benefit plan target allocation percentage of assets cash and cash equivalents range maximum.

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Defined benefit plan target allocation percentage of assets cash and cash equivalents range minimum.

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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=35743120&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=35743120&loc=d3e2446-114920

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