For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

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

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-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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-Article 5

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BUSINESS SEGMENT INFORMATION (Details 2) (USD $)	3 Months Ended													6 Months Ended		9 Months Ended	12 Months Ended
BUSINESS SEGMENT INFORMATION (Details 2) (USD $)	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Mar. 31, 2012	Mar. 31, 2011	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Business segment financial data
Sales	$ 313,371,000	$ 359,687,000	$ 365,397,000	$ 339,645,000	$ 316,766,000	$ 343,021,000	$ 322,787,000	$ 347,889,000	$ 281,884,000	$ 353,996,000	$ 325,118,000	$ 272,483,000	$ 246,595,000	$ 655,272,000	$ 630,967,000	$ 953,691,000	$ 1,381,495,000	$ 1,295,581,000	$ 1,198,192,000	$ 1,025,924,000
Long-lived assets, net		59,200,000				52,500,000				53,000,000							59,200,000	52,500,000	53,000,000	55,900,000
Minimum percentage of revenue accounted for by no other customer																	10.00%
United States
Business segment financial data
Sales																	729,500,000	754,000,000	790,900,000	654,600,000
Long-lived assets, net		42,400,000				40,500,000				41,300,000							42,400,000	40,500,000	41,300,000	43,700,000
United Kingdom
Business segment financial data
Sales																	273,100,000	244,000,000	200,300,000	196,900,000
Long-lived assets, net		9,500,000				9,100,000				9,500,000							9,500,000	9,100,000	9,500,000	10,200,000
Canada
Business segment financial data
Sales																	54,900,000	27,500,000	9,400,000	18,700,000
Australia
Business segment financial data
Sales																	182,500,000	101,100,000	56,300,000	41,300,000
Middle East
Business segment financial data
Sales																	30,800,000	35,400,000	27,900,000	19,200,000
Far East
Business segment financial data
Sales																	564,000	82,700,000	85,500,000	63,900,000
Other foreign countries
Business segment financial data
Sales																	47,100,000	50,900,000	27,900,000	31,300,000
Long-lived assets, net		$ 6,100,000				$ 2,900,000				$ 2,200,000							$ 6,100,000	$ 2,900,000	$ 2,200,000	$ 2,000,000