Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 330,097	$ 328,769
Accum. Amortization	238,018	227,986
Net	92,079	100,783
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	305,890	304,699
Accum. Amortization	233,298	224,215
Net	72,592	80,484
Trade Names And Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,207	24,070
Accum. Amortization	4,720	3,771
Net	$ 19,487	$ 20,299

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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