Commitments And Contingencies (Details) (USD $)	9 Months Ended
Jun. 30, 2011	Sep. 30, 2010
Commitments And Contingencies
Service taxes paid	$ 10,100,000
Accrued additional service tax	1,700,000
Total service taxes	11,800,000
Long-term other receivable	15,799,000	15,799,000
Accounts receivable relating to service taxes	11,800,000
Accounts receivable relating to revenues	$ 4,000,000

Amount due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_AccountsReceivableNetNoncurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant