Condensed Consolidated Statements of Cash Flows Parenthetical (USD $) In Thousands, unless otherwise specified	6 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Decrease in construction payables	$ 4,357	$ 5,391

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