Description of Business and Basis of Presentation Change in Accounting Estimate (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014
Change in Accounting Estimate [Line Items]
Document Period End Date	Mar. 31, 2014
Depreciation Affect of Change in Estimate	$ 0.7
Depreciation Affect of Change in Estimate - Full Year Impact	$ 2.8

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

No definition available.

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Namespace Prefix:	dei_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration