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Share-based Compensation and Employee Benefit Plans - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 08, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Sep. 30, 2016
Treasury Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares associated with employee tax withholding for vesting of certain equity awards (in shares)       9,576    
TPG            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted shares awarded by related party (in shares)           100,000
2016 LTIP            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Effective period of plan 10 years          
Number of shares available for grant 9,000,000          
Maximum number of shares per calendar year employees are allowed to receive (in shares)   1,000,000   1,000,000    
Maximum value of award employee may receive per calendar year   $ 12,000,000   $ 12,000,000    
Shares available for issuance (in shares)       7,238,801    
2016 LTIP | Non-Employee Board Member            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum value of award employee may receive per calendar year   $ 1,000,000   $ 1,000,000    
PSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)       212,000    
Stockholder return   35.00%   35.00%    
Entitled percentage of common shares to recipient with a 35% stockholder return   100.00%   100.00%    
Shares authorized for issuance (up to) (in shares)   424,000   424,000    
Minimum stockholder return for awards to be awarded   15.00%   15.00%    
Volatility rate       40.00%    
Expected dividend yield       0.00%    
Weighted average remaining contractual term       2 years    
Unrecognized compensation cost related to non-vested performance share units   $ 8,600,000   $ 8,600,000    
Shares vested (in shares)       0    
PSUs | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Entitled percentage of common shares to recipient   0.00%   0.00%    
Risk-free interest rate       0.93%    
PSUs | Minimum | Negative 15 to 0 Return            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Entitled percentage of common shares to recipient   50.00%   50.00%    
Stockholder return   (15.00%)   (15.00%)    
PSUs | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Entitled percentage of common shares to recipient   200.00%   200.00%    
Risk-free interest rate       1.30%    
PSUs | Maximum | Negative 15 to 0 Return            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Entitled percentage of common shares to recipient   70.00%   70.00%    
Stockholder return   0.00%   0.00%    
PSUs | Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation cost   $ 1,300,000 $ 300,000 $ 3,500,000 $ 300,000  
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)       5,434    
Weighted average remaining contractual term       1 month 6 days    
Unrecognized compensation cost related to non-vested performance share units   100,000   $ 100,000    
Shares vested (in shares)       0    
Restricted Stock | Non-Employee Board Member            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)           64,518
Restricted Stock | Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation cost   100,000   $ 400,000    
Restricted Stock | TPG            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average remaining contractual term       1 year 10 months 24 days    
Unrecognized compensation cost related to non-vested performance share units   $ 600,000   $ 600,000    
Vesting period           3 years
Shares vested (in shares)   33,333        
Restricted Stock | TPG | Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation cost   $ 100,000   $ 300,000    
RSU            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)       28,000    
Performance period       3 years    
Weighted average remaining contractual term       2 years 4 months 24 days    
Unrecognized compensation cost related to non-vested performance share units   $ 100,000   $ 100,000    
Shares vested (in shares)       0    
RSU | Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation cost       $ 100,000    
Phantom RSU            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards issued to certain non-U.S employees (in shares)       10,500    
Phantom RSU | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period       2 years    
Phantom RSU | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period       3 years    
Phantom PSU            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards issued to certain non-U.S employees (in shares)       10,000