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Share and Incentive Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2016 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Oct. 01, 2016
Share and Incentive Based Compensation Arrangement |  |  |  |  |  |
Shares authorized for issuance |  |  |  |  |  | 4,600,000
Accelerated vesting compensation cost |  | $ 181 | $ 1,825 | $ 13,131 | $ 1,825 |
Number of Shares |  | 0 | 96,000 | 763,000 | 96,000 |
Performance units weighted average grant date fair value | $ 100 |  |  |  |  |
Aggregate intrinsic value of performance units vested |  | $ 3,700 |  | $ 4,800 |  |
Performance units compensation expense |  | 1,289 | $ 972 | 4,794 | $ 1,562 |
Restricted Stock |  |  |  |  |  |
Share and Incentive Based Compensation Arrangement |  |  |  |  |  |
Aggregate intrinsic value of vested awards |  | 12,500 |  | $ 15,900 |  |
Shares granted |  |  |  | 5,000 |  |
Restricted Stock | Minimum |  |  |  |  |  |
Share and Incentive Based Compensation Arrangement |  |  |  |  |  |
Vesting period |  |  |  | 1 year |  |
Restricted Stock | Maximum |  |  |  |  |  |
Share and Incentive Based Compensation Arrangement |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |
Performance Share Units |  |  |  |  |  |
Share and Incentive Based Compensation Arrangement |  |  |  |  |  |
Aggregate intrinsic value of vested awards |  | $ 2,200 |  | $ 2,700 |  |
Shares granted |  |  |  | 0 |  |

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- Definition Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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=96867065&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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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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