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Per Common Share Amounts (Details)
12 Months Ended
Jun. 05, 2015
Sep. 30, 2016
shares
Class A membership units    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Adjustment for dilution of shares   15,000,000
Conversion ratio 1 1
Weighted average number of shares outstanding, diluted (in shares)   31,082,432
Class A common shares | Class A membership units    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Membership units (in units)   15,082,432
Class B-1 common shares    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Weighted average number of shares outstanding, basic (in shares)   1,000,000
Conversion ratio 1 1