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Reportable Segments (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 item | Mar. 31, 2013
Reportable Segments |  |  |  |
Number of reportable segments |  |  | 2 |
Summarized financial information concerning the Company's reportable segments |  |  |  |
Revenue | $ 1,872,224,000 | $ 1,989,646,000 | $ 3,826,099,000 | $ 4,006,918,000
Revenue, net of other direct costs | 1,180,200,000 | 1,251,900,000 | 2,331,700,000 | 2,496,900,000
Gross profit | 87,407,000 | 99,843,000 | 165,605,000 | 177,961,000
Equity in earnings of joint ventures | 7,436,000 | 7,846,000 | 43,519,000 | 13,761,000
General and administrative expenses | (26,449,000) | (27,253,000) | (50,294,000) | (49,355,000)
Operating income (loss) | 68,394,000 | 80,436,000 | 158,830,000 | 142,367,000
Gross profit as a % of revenue | 4.70% | 5.00% | 4.30% | 4.40%
Gross profit as a % of revenue, net of other direct costs | 7.40% | 8.00% | 7.10% | 7.10%
Corporate |  |  |  |
Summarized financial information concerning the Company's reportable segments |  |  |  |
General and administrative expenses | (26,400,000) | (27,300,000) | (50,300,000) | (49,400,000)
Operating income (loss) | (26,400,000) | (27,300,000) | (50,300,000) | (49,400,000)
Professional Technical Services |  |  |  |
Summarized financial information concerning the Company's reportable segments |  |  |  |
Revenue | 1,683,600,000 | 1,765,900,000 | 3,453,800,000 | 3,537,100,000
Revenue, net of other direct costs | 1,088,100,000 | 1,110,300,000 | 2,129,700,000 | 2,204,100,000
Gross profit | 85,300,000 | 92,200,000 | 145,200,000 | 161,400,000
Equity in earnings of joint ventures | 300,000 | 4,100,000 | 34,500,000 | 9,400,000
Operating income (loss) | 85,600,000 | 96,300,000 | 179,700,000 | 170,800,000
Gross profit as a % of revenue | 5.10% | 5.20% | 4.20% | 4.60%
Gross profit as a % of revenue, net of other direct costs | 7.80% | 8.30% | 6.80% | 7.30%
Management Support Services |  |  |  |
Summarized financial information concerning the Company's reportable segments |  |  |  |
Revenue | 188,600,000 | 223,700,000 | 372,300,000 | 469,800,000
Revenue, net of other direct costs | 92,100,000 | 141,600,000 | 202,000,000 | 292,800,000
Gross profit | 2,100,000 | 7,700,000 | 20,400,000 | 16,600,000
Equity in earnings of joint ventures | 7,100,000 | 3,800,000 | 9,000,000 | 4,400,000
Operating income (loss) | $ 9,200,000 | $ 11,500,000 | $ 29,400,000 | $ 21,000,000
Gross profit as a % of revenue | 1.10% | 3.40% | 5.50% | 3.50%
Gross profit as a % of revenue, net of other direct costs | 2.30% | 5.40% | 10.10% | 5.70%

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