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Business (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018	Oct. 01, 2018
Income Taxes [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			21.00%		24.53%
Income Tax Reconciliation Change In Enacted Tax Rate				$ 31,487
Business Acquisition [Line Items]
Minority Interest Ownership Percentage By Parent	80.00%		80.00%
MinorityInterestOwnershipPercentageByNoncontrollingOwners	20.00%		20.00%
Redeemable Noncontrolling Interest, Current Value	$ 1,428		$ 1,428
Minority Interest Change in Redemption Value	$ 0	$ 44	$ 0	$ 44
New Accounting Pronouncements And Changes In Accounting Principles (Abstract)
New Accounting Pronouncement Or Change In Accounting Principle Cumulative Effect Of Change On Equity Or Net Assets 1						$ 102

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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Redemption value, as if currently redeemable, of redeemable noncontrolling interest classified as temporary equity and the election has been made to accrete changes in redemption value to the earliest redemption date.

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