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Earnings Per Share - Additional Information (Details) - $ / shares shares in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Earnings Per Share, Potentially Dilutive Securities |  | 1.8
Document Fiscal Year Focus | 2017 |
Basic (in dollars per share) | $ 1.06 | $ (0.17)
HGI [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Document Fiscal Year Focus | 2016 |
Stock option awards [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,567 | 1,303
Warrant [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 104 | 0
Restricted stock awards [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,326 | 2,822
Warrant [Member] | HGI [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ 13.13 | $ 13.125

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