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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