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Stock-based Compensation (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Jul. 31, 2015
Sep. 30, 2015
Sep. 30, 2016
Jul. 31, 2015
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation, nonvested awards, compensation cost not yet recognized     $ 2,600,000   $ 2,600,000
Period for recognition of compensation on unvested stock option         1 year 10 months 24 days
Chief Executive Officer, President, and Chief Financial Officer          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Net charge, modification and vesting of restricted stock     700,000   $ 1,300,000
Successor          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 700,000 $ 1,300,000   $ 3,200,000
Predecessor          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense $ 0     $ 0