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Earnings Per Share - Antidilutive Securities (Details) - shares shares in Thousands | 3 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Restricted Stock |  |
Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 493 | 556
Time Based Restricted Stock Awards |  |
Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 195 | 828
Performance Shares |  |
Earnings Per Share [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 0 | 628

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- Definition Earnings Per Share [Line Items] + References No definition available. + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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