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Fair Value of Financial Instruments (Short-term Investments and Financial Instruments at Fair Value) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012
--- | --- | --- | --- | --- | --- | ---
Assets |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | $ 15,541 |  | $ 13,752 |  |  |
Forward foreign currency exchange contracts | 90 |  | 308 |  |  |
Total asset at fair value | 15,631 |  | 14,060 |  |  |
Liabilities [Abstract] |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 15,541 |  | 13,752 |  |  |
Forward foreign currency exchange contracts | 63 |  | 34 |  |  |
Liability for contingent consideration, current and non-current portion | 9,547 |  | 12,545 |  |  |
Total liabilities at fair value | 25,151 |  | 26,331 |  |  |
Quoted Prices in Active Markets (Level 1) [Member] |  |  |  |  |  |
Assets |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 15,541 |  | 13,752 |  |  |
Forward foreign currency exchange contracts | 0 |  | 0 |  |  |
Total asset at fair value | 15,541 |  | 13,752 |  |  |
Liabilities [Abstract] |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 15,541 |  | 13,752 |  |  |
Forward foreign currency exchange contracts | 0 |  | 0 |  |  |
Liability for contingent consideration, current and non-current portion | 0 |  | 0 |  |  |
Total liabilities at fair value | 15,541 |  | 13,752 |  |  |
Significant Other Observable Inputs (Level 2) [Member] |  |  |  |  |  |
Assets |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 0 |  | 0 |  |  |
Forward foreign currency exchange contracts | 90 |  | 308 |  |  |
Total asset at fair value | 90 |  | 308 |  |  |
Liabilities [Abstract] |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 0 |  | 0 |  |  |
Forward foreign currency exchange contracts | 63 |  | 34 |  |  |
Liability for contingent consideration, current and non-current portion | 0 |  | 0 |  |  |
Total liabilities at fair value | 63 |  | 34 |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Assets |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 0 |  | 0 |  |  |
Forward foreign currency exchange contracts | 0 |  | 0 |  |  |
Total asset at fair value | 0 |  | 0 |  |  |
Liabilities [Abstract] |  |  |  |  |  |
Deferred compensation plan investments, current and non-current portion | 0 |  | 0 |  |  |
Forward foreign currency exchange contracts | 0 |  | 0 |  |  |
Liability for contingent consideration, current and non-current portion | 9,547 | 9,506 | 12,545 | 13,090 | 17,342 | 16,653
Total liabilities at fair value | $ 9,547 |  | $ 12,545 |  |  |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
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