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Selected Quarterly Financial Information (unaudited) (Textuals) (Details) $ in Millions | 3 Months Ended
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Dec. 31, 2017 USD ($)
Quarterly Financial Information Disclosure [Abstract] |
One-time charge to revalue deferred tax assets and liabilities | $ 31.8

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- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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