Amount of debt hedged by interest rate derivatives.

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- Definition

Derivative interest rate cap arrangement.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of the total principal payments made during the annual reporting period.

+ Details

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- Definition

Line of credit facility maximum interest rate per annum.

+ Details

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Period Type:	duration

- Definition

The amount of a specific compensating balance arrangement that is maintained under an agreement for a bank loan or future credit availability.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-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 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ Details

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Balance Type:	na
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- Definition

Fixed interest rate related to the interest rate derivative.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Fair value of the amount outstanding under the credit facility.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611

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Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ Details

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Lines Of Credit (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2011	Jun. 30, 2011
Line of Credit Facility [Line Items]
Line of credit facility maximum interest rate per annum		1.75%
Line of credit facility, maturity date		June 30, 2016
Max commitment fee on revolving loan unused amount, percentage		0.40%
Principal amount of debt hedged with an interest rate swap agreement	$ 75
Gross overdraft balance related to pooling arrangement	37.8	50.2
Maximum [Member] \| JP Morgan UK [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowing	4.00%
Minimum [Member] \| JP Morgan UK [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowing	2.00%
JP Morgan UK [Member]
Line of Credit Facility [Line Items]
Principal amount available through revolving credit facility	4.5
Remaining borrowing available under revolving credit facility	4.5
JP Morgan [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maturity date	June 30, 2011
JP Morgan [Member] \| 2010 Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity	25
Bank Of America [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maturity date	June 30, 2011
Bank Of America [Member] \| 2010 Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity	25
KeyBank [Member] \| 2010 Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity	25
HSBC [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity	25
5% Interest Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facility annual principal payment in percentage		5.00%
5% Interest Repaid During One-Year Period Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facility annual principal payment in percentage		5.00%
10% Interest Repaid During One-Year Period Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facility annual principal payment in percentage		10.00%
20% Interest Repaid During One-Year Period Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facility annual principal payment in percentage		20.00%
60% Interest Repaid During One-Year Period Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facility annual principal payment in percentage		60.00%
2011 Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of credit facility amount outstanding		245.00
Interest rate swap, fixed interest rate	1.30%
Derivative interest rate cap arrangement	2.00%
Principal amount of debt hedged with an interest rate swap agreement	100
Interest rate swap, average interest rate	1.90%
2010 Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity	75
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity		300
Line of credit facility amount outstanding	170.00
Remaining borrowing available under revolving credit facility		130.0
Term Loan [Member]
Line of Credit Facility [Line Items]
Credit agreement maximum borrowing capacity		100
Line of credit facility amount outstanding	$ 98.80