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Reportable Segments (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2013 item | Mar. 31, 2012
Reportable Segments |  |  |  |
Number of reportable segments |  |  | 2 |
Summarized financial information concerning the Company's reportable segments |  |  |  |
Revenue | $ 1,989,646,000 | $ 2,010,951,000 | $ 4,006,918,000 | $ 4,040,131,000
Revenue, net of other direct costs | 1,251,900,000 | 1,289,500,000 | 2,496,900,000 | 2,520,300,000
Gross profit (loss) | 99,843,000 | 76,117,000 | 177,961,000 | 166,463,000
Equity in earnings of joint ventures | 7,846,000 | 16,898,000 | 13,761,000 | 25,860,000
General and administrative expenses | (27,253,000) | (19,857,000) | (49,355,000) | (42,468,000)
Operating income | 80,436,000 | 73,158,000 | 142,367,000 | 149,855,000
Gross profit as a % of revenue | 5.00% | 3.80% | 4.40% | 4.10%
Gross profit as a % of revenue, net of other direct costs | 8.00% | 5.90% | 7.10% | 6.60%
Professional Technical Services |  |  |  |
Summarized financial information concerning the Company's reportable segments |  |  |  |
Revenue | 1,765,900,000 | 1,801,100,000 | 3,537,100,000 | 3,608,500,000
Revenue, net of other direct costs | 1,110,300,000 | 1,163,100,000 | 2,204,100,000 | 2,264,000,000
Gross profit (loss) | 92,200,000 | 86,400,000 | 161,400,000 | 171,200,000
Equity in earnings of joint ventures | 4,100,000 | 4,600,000 | 9,400,000 | 7,000,000
Operating income | 96,300,000 | 91,000,000 | 170,800,000 | 178,200,000
Gross profit as a % of revenue | 5.20% | 4.80% | 4.60% | 4.70%
Gross profit as a % of revenue, net of other direct costs | 8.30% | 7.40% | 7.30% | 7.60%
Management Support Services |  |  |  |
Summarized financial information concerning the Company's reportable segments |  |  |  |
Revenue | 223,700,000 | 209,800,000 | 469,800,000 | 431,600,000
Revenue, net of other direct costs | 141,600,000 | 126,400,000 | 292,800,000 | 256,300,000
Gross profit (loss) | 7,700,000 | (10,200,000) | 16,600,000 | (4,700,000)
Equity in earnings of joint ventures | 3,800,000 | 12,300,000 | 4,400,000 | 18,900,000
Operating income | 11,500,000 | 2,100,000 | 21,000,000 | 14,200,000
Gross profit as a % of revenue | 3.40% | (4.90%) | 3.50% | (1.10%)
Gross profit as a % of revenue, net of other direct costs | 5.40% | (8.10%) | 5.70% | (1.80%)
Corporate |  |  |  |
Summarized financial information concerning the Company's reportable segments |  |  |  |
General and administrative expenses | (27,300,000) | (19,900,000) | (49,400,000) | (42,500,000)
Operating income | $ (27,300,000) | $ (19,900,000) | $ (49,400,000) | $ (42,500,000)

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