Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Reorganization Of Goodwill Excess Tax Basis	$ 24,012
SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound	3,284
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	14	$ 11
Deferred Tax Assets, Net	95,280	101,094
Uncertain Tax Benefit Net Opertating Loss From Goodwill	50,180	$ 50,581
2017 Business Acquisitions
Income Taxes [Line Items]
Goodwill Tax Basis	3,411
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	142,052
Operating Loss Carryforwards	$ 378,274
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	6,347
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards Attributable To Additional Goodwill Amortization	6,188
Operating Loss Carryforwards	77,373
DeferredTaxAssetOffsetByDeferredTaxLiability	427
Deferred Tax Assets, Net	$ 587