The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Guarantees and Other Commitments and Contingencies Japan Joint Venture (Details) (Japan JV [Member]) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2012 Guarantee of Indebtedness of Others [Member] USD ($)	Sep. 30, 2012 Guarantee of Indebtedness of Others [Member] JPY (¥)	Sep. 30, 2012 Additional Guarantees Expected [Member] USD ($)
Guarantor Obligations [Line Items]
Equity method investment, ownership percentage of majority owners	51.00%
Equity method investment, ownership percentage	49.00%
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 3,500	¥ 273,900	$ 6,500