| Intangibles (Tables) | 3 Months Ended | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2019 | ||||||||||||||||||||||||||||||||||||
| Goodwill And Intangible Assets Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||
| Future Amortization Expense Related to Intangible Assets | The following table summarizes estimated future amortization expense related to intangible assets that have net balances as of December 31, 2019: 
 
 
 | 
| X | ||||||||||
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- References No definition available. 
 | 
| X | ||||||||||
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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