Quarterly report pursuant to Section 13 or 15(d)

Income Taxes ST Income Tax Payable (Details)

v3.19.1
Income Taxes ST Income Tax Payable (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2017
Mar. 31, 2019
Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
ProvisionalDiscreteNetTaxExpense   $ 14,300,000.0    
BlendedCorporateTaxRate       24.50%
Transition Tax Amount     $ 25,100,000 $ 24,600,000
Provisional Transition Tax Obligation Current $ 2,000,000      
DTLProvisionalCorporateRateReductionNetBenefit   $ 14,900,000.0    
Transition Tax Amount [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Deferred Tax Liabilities, Deferred Expense 1,300,000   1,300,000  
Income Taxes Paid     2,000,000  
Increase (Decrease) in Accrued Taxes Payable     500,000  
Accrued Income Taxes, Noncurrent $ 21,100,000   $ 21,100,000