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Employee Benefit Plans Deferred Compensation Plan (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Board of Directors Chairman [Member]	Sep. 30, 2013 Board of Directors Chairman [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation distributions	$ 6.1	$ 0.8	$ 1.1
Deferred compensation arrangement with individual, distributions paid					5.6
Increase (decrease) in deferred compensation	(0.8)	(1.3)	(0.3)	5.6
Proceeds from life insurance policies				5.0
Deferred compensation arrangement with individuals, recorded liability	$ 6.2	$ 11.3

X

- Definition

The amount of distributions made from the deferred compensation plan to individuals in accordance with the terms and understanding of the deferred compensation arrangement during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

The amount of distributions made to the individual during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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X

- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 30

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

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- Definition

The increase (decrease) during the reporting period in the obligation created by employee agreements whereby earned compensation will be paid in the future.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Definition

The cash inflow for proceeds from life insurance policies for which the entity is the beneficiary.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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