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Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2011
Significant Accounting Policies |
Pass-Through Costs Included In Revenues |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Pass-through costs included in revenues |  | $ | 2,118.5 |  |  | $ | 2,723.3 |  |  | $ | 4,017.0 |
Schedule Of Acquired Intangible Assets |
|  | Customer Relationships, Contracts, and Backlog |  |  | Developed Technology |  |  | Trade Names |  |  | Other |  |  | Total |
Balances, September 26, 2008 |  | $ | 54,250 |  |  | $ | — |  |  | $ | 2,789 |  |  | $ | 2,864 |  |  | $ | 59,903 |
Acquisitions |  |  | 7,173 |  |  |  | — |  |  |  | 478 |  |  |  | 87 |  |  |  | 7,738 |
Amortization |  |  | (6,416 | ) |  |  | — |  |  |  | (1,674 | ) |  |  | (630 | ) |  |  | (8,720 | )
Foreign currency translation |  |  | (1,332 | ) |  |  | — |  |  |  | (85 | ) |  |  | (45 | ) |  |  | (1,462 | )
Balances, October 2, 2009 |  |  | 53,675 |  |  |  | — |  |  |  | 1,508 |  |  |  | 2,276 |  |  |  | 57,459 |
Acquisitions |  |  | 50,600 |  |  |  | — |  |  |  | 2,400 |  |  |  | 1,100 |  |  |  | 54,100 |
Amortization |  |  | (8,619 | ) |  |  | — |  |  |  | (1,851 | ) |  |  | (736 | ) |  |  | (11,206 | )
Foreign currency translation |  |  | (178 | ) |  |  | — |  |  |  | (5 | ) |  |  | (125 | ) |  |  | (308 | )
Balances, October 1, 2010 |  |  | 95,478 |  |  |  | — |  |  |  | 2,052 |  |  |  | 2,515 |  |  |  | 100,045 |
Acquisitions |  |  | 155,512 |  |  |  | 23,000 |  |  |  | 2,744 |  |  |  | 2,542 |  |  |  | 183,798 |
Amortization |  |  | (21,239 | ) |  |  | (1,023 | ) |  |  | (1,214 | ) |  |  | (1,225 | ) |  |  | (24,701 | )
Foreign currency translation |  |  | (13 | ) |  |  | — |  |  |  | (109 | ) |  |  | (14 | ) |  |  | (136 | )
Balances, September 30, 2011 |  | $ | 229,738 |  |  | $ | 21,977 |  |  | $ | 3,473 |  |  | $ | 3,818 |  |  | $ | 259,006 |
Estimated remaining useful lives (years) |  |  | 1- 14 |  |  |  | 15 |  |  |  | 1- 20 |  |  |  | 1- 8 |  |  |  |  |
Fair Value Of Option Grant Date Award |
|  | Awards Made to Employees |  |  | Awards Made to Directors |
|  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | % |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 41.54 | % |  |  | 43.12 | % |  |  | 45.42 | % |  |  | 41.97 | % |  |  | 40.78 | % |  |  | 47.62 | %
Risk-free interest rate |  |  | 2.00 | % |  |  | 2.54 | % |  |  | 2.94 |  |  |  | 2.40 | % |  |  | 2.85 | % |  |  | 2.44 |
Expected term of options (in years) |  |  | 5.82 |  |  |  | 6.14 |  |  |  | 6.25 |  |  |  | 5.82 |  |  |  | 6.29 |  |  |  | 6.29 |
Fair Value Of Restricted Stock Unit Grant Date Awards |
|  | 2011 |
Dividend yield |  |  | 0 | %
Expected volatility |  |  | 46.67 | %
Risk-free interest rate |  |  | 0.83 | %
Expected term (in years) |  |  | 3.0 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44 -Subparagraph a -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 FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275 + Details
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