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Stock-Based Compensation - Summary of unrecognized stock-based compensation expense (Details) - Jun. 30, 2015 - USD ($) $ in Millions | Total
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized stock-based compensation expense | $ 16.7
Weighted Average Remaining Vesting Period (Years) | 2 years 5 months 19 days
Unrecognized stock option expense |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized stock-based compensation expense | $ 5.0
Weighted Average Remaining Vesting Period (Years) | 2 years 6 months 26 days
Unrecognized RSU/DSU expense |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized stock-based compensation expense | $ 0.7
Weighted Average Remaining Vesting Period (Years) | 1 year 2 months 19 days
Unrecognized PRSU expense |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total unrecognized stock-based compensation expense | $ 11.0
Weighted Average Remaining Vesting Period (Years) | 2 years 6 months

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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 + Details
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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. + 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 + Details
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- Definition 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. + References No definition available. + Details
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