Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable within one year (or the operating cycle, if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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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- Definition

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.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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Stock-Based Compensation (Details 1) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Apr. 30, 2016	Sep. 30, 2016	Sep. 30, 2016
Stock-based Compensation
Employee stock purchase plan, purchase price of common stock, percent	85.00%
Employee stock purchase plan obligation	$ 0.2		$ 0.2	$ 0.2
Employee stock option
Stock-based Compensation
Weighted-average grant-date fair value (in dollars per share)			$ 27.19	$ 19.25
Total unrecognized compensation expense	70.0		$ 70.0	$ 70.0
Weighted average period over which unrecognized compensation is expected to be recognized				3 years
Restricted stock units (RSUs)
Stock-based Compensation
Weighted-average grant-date fair value (in dollars per share)		$ 33.03
Total unrecognized compensation expense	$ 1.6		$ 1.6	$ 1.6
Weighted average period over which unrecognized compensation is expected to be recognized				4 years