Stock-Based Compensation Compensation Cost Not Yet Recognized (Details) $ in Thousands	9 Months Ended
Sep. 30, 2015 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Nonvested awards, unrecognized compensation cost	$ 70,193
Nonvested awards, weighted average remaining recognition period	2 years 6 months

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration