Related Party Transactions - Shared Services Agreement (Details) - TBCO - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2017  | 
Mar. 31, 2016  | 
Mar. 31, 2017  | 
Mar. 31, 2016  | 
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| Related Party Transaction [Line Items] | ||||
| Payments for services and covenants | $ 465 | |||
| Expense under shared services agreement | $ 147 | $ 99 | $ 220 | $ 198 | 
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- Definition Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Details 
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