Stock-Based Compensation - Total Unrecognized Stock Based Compensation Cost Related to the Stock Options and Restricted Stock (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Unrecognized stock-based compensation expense
Total unrecognized stock-based compensation expense	$ 15,125	$ 9,311
Restricted Stock Units
Unrecognized stock-based compensation expense
Unrecognized restricted stock unit compensation expense	$ 8,130	5,094
Weighted average period of recognition	2 years 4 months 24 days
Stock Options
Unrecognized stock-based compensation expense
Unrecognized stock option compensation expense	$ 6,995	$ 4,217
Weighted average period of recognition	2 years 6 months

Unrecognized cost of unvested share-based compensation awards.

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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- References

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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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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

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