Business Acquisitions (Schedule of Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	3 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2011 Business Acquisition, Acquiree - IDS [Member]
Cash paid to sellers			$ 48,412
Less cash acquired			(1,251)
Total purchase price			47,161
Business acquisitions, marketable securities acquired	0	(8,463)	(8,463)
Price paid for business assets	$ 0	$ 38,698	$ 38,698

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15, 16, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration