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Stockholders' Equity - New Hire Equity Awards (Details) | Sep. 18, 2017 award $ / shares shares
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Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Number of equity awards | award | 2
Time-vesting New Hire Award |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Number of equity awards | award | 1
Time-vesting New Hire Award grants (in shares) | shares | 30,000
Grant date fair value (in dollars per share) | $ 42.89
Performance-vesting New Hire Award |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Time-vesting New Hire Award grants (in shares) | shares | 70,000
Grant date fair value (in dollars per share) | $ 10.63
Target level for determination of performance goals measures | 100.00%
Performance-vesting New Hire Award | Tranche One |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Cumulative total stockholder return rate | 33.00%
Performance-vesting New Hire Award | Tranche One | Minimum |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Share price (in dollars per share) | $ 60
Performance-vesting New Hire Award | Tranche Two | Minimum |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Share price (in dollars per share) | $ 75

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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