Goodwill And Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2016	Sep. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 52,254	$ 51,714
Accumulated Amortization	39,605	38,662
Net Carrying Amount	12,649	13,052
Accumulated Intangibles Impairment Charge	20,820	20,820
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,198	43,131
Accumulated Amortization	34,496	33,716
Net Carrying Amount	8,702	9,415
Accumulated Intangibles Impairment Charge	18,657	18,657
Trademarks And Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,183	2,181
Accumulated Amortization	2,051	2,051
Net Carrying Amount	132	130
Accumulated Intangibles Impairment Charge	1,498	1,498
Licenses And Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,296	5,825
Accumulated Amortization	2,501	2,338
Net Carrying Amount	3,795	3,487
Accumulated Intangibles Impairment Charge	665	665
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	577	577
Accumulated Amortization	557	557
Net Carrying Amount	$ 20	$ 20