CONSOLIDATED STATEMENTS OF CASH FLOWS PARENTHETICAL (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Decrease in construction payables	$ 5,516	$ 4,551	$ 83,702

The increase (decrease) during the reporting period of obligations, not classified as trade payables, incurred and payable for the acquisition of merchandise, materials, supplies, and services pertaining to construction projects.

No definition available.

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