Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	24.53%	35.00%
Reorganization Of Goodwill Excess Tax Basis	$ 23,735
SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound	5,754
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	35	$ 14
Deferred Tax Assets, Net	53,777	95,280
Uncertain Tax Benefit Net Opertating Loss From Goodwill	28,453	$ 50,180
Goodwill Tax Basis	1,448
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Cash Tax Reduction Attributable To Additional Goodwill Amortization	11,487
Operating Loss Carryforwards Attributable To Additional Goodwill Amortization	133,291
Operating Loss Carryforwards	$ 355,302
Tax Credit Carryforward, Limitations on Use	The annual limitation under Section 382 on the utilization of federal net operating losses was approximately $20,000 for the first five tax years subsequent to the change in ownership and $16,000 thereafter.
Carryforward Amount Excluded From Limitations on Use	$ 300,400
DeferredTaxAssetOffsetByDeferredTaxLiability	4,247
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards Attributable To Additional Goodwill Amortization	8,806
Operating Loss Carryforwards	100,772
DeferredTaxAssetOffsetByDeferredTaxLiability	696
Deferred Tax Assets, Net	$ 681