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Selected Quarterly Information - Unaudited (Details) (USD $) In Thousands, except Per Share data | 3 Months Ended | 12 Months Ended
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Sep. 30, 2011 | Jul. 01, 2011 | Apr. 01, 2011 | Dec. 31, 2010 | Oct. 01, 2010 | Jul. 02, 2010 | Apr. 02, 2010 | Jan. 01, 2010 | Oct. 02, 2009 | Jun. 30, 2009 | Mar. 31, 2009 | Dec. 31, 2008 | Sep. 30, 2011 | Oct. 01, 2010 | Oct. 02, 2009
Selected Quarterly Information - Unaudited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 2,723,295 |  | $ 2,744,178 |  | $ 2,558,016 |  | $ 2,356,175 |  | $ 2,343,033 |  | $ 2,507,725 |  | $ 2,586,974 |  | $ 2,477,785 |  | $ 2,552,547 |  | $ 2,706,724 |  | $ 2,975,452 |  | $ 3,232,653 |  | $ 10,381,664 |  | $ 9,915,517 |  | $ 11,467,376 |
Operating profit | 147,904 | [1] | 139,380 | [1] | 128,015 | [1] | 103,619 | [1] | 119,515 | [1] | 45,083 | [1] | 122,004 | [1] | 113,481 | [1] | 122,143 | [1] | 146,674 | [1] | 170,688 | [1] | 181,068 | [1] | 518,918 | [1] | 400,083 | [1] | 620,573 | [1]
Earnings before taxes | 145,156 |  | 141,301 |  | 126,481 |  | 103,723 |  | 120,387 |  | 37,239 |  | 121,160 |  | 113,148 |  | 123,856 |  | 148,067 |  | 170,628 |  | 181,581 |  | 516,661 |  | 391,934 |  | 624,132 |
Net earnings of the Group | 95,247 |  | 91,936 |  | 81,341 |  | 66,697 |  | 77,079 |  | 19,240 |  | 77,567 |  | 72,401 |  | 79,240 |  | 94,686 |  | 109,171 |  | 116,116 |  | 335,221 |  | 246,287 |  | 399,213 |
Net earnings attributable to Jacobs | $ 94,280 |  | $ 90,676 |  | $ 80,250 |  | $ 65,823 |  | $ 76,994 |  | $ 19,043 | [2] | $ 77,500 |  | $ 72,437 |  | $ 79,317 |  | $ 94,900 |  | $ 109,287 |  | $ 116,350 |  | $ 331,029 |  | $ 245,974 | [2] | $ 399,854 |
Basic | $ 0.75 |  | $ 0.72 |  | $ 0.64 |  | $ 0.53 |  | $ 0.62 |  | $ 0.15 | [2] | $ 0.63 |  | $ 0.59 |  | $ 0.64 |  | $ 0.77 |  | $ 0.89 |  | $ 0.95 |  | $ 2.63 |  | $ 1.98 | [2] | $ 3.26 |
Diluted | $ 0.74 |  | $ 0.71 |  | $ 0.63 |  | $ 0.52 |  | $ 0.61 |  | $ 0.15 | [2] | $ 0.62 |  | $ 0.58 |  | $ 0.63 |  | $ 0.76 |  | $ 0.88 |  | $ 0.94 |  | $ 2.60 |  | $ 1.96 | [2] | $ 3.21 |
Non-recurring loss on basic per share |  |  |  |  |  |  |  |  |  |  | $ 60.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-recurring loss on diluted per share |  |  |  |  |  |  |  |  |  |  | $ 0.48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Operating profit represents revenues less (i) direct costs of contracts, and (ii) selling, general and administrative expenses.
[2] | Includes a non-recurring loss of $60.3 million, or $0.48 per basic and diluted share, related to the SIVOM judgment.

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