Share-Based Compensation (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Unearned non-cash share-based compensation
Weighted average period for recognition of share-based compensation expense	2 years 2 months 12 days
Unearned non-cash share-based compensation expense expected to be recognized	$ 3.5
Estimated forfeiture rate (as a percent)	2.00%

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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Period Type:	duration