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Quarterly Financial Information-Unaudited (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013
Revenue | $ 4,723,700 | $ 4,549,500 | $ 4,506,200 | $ 4,210,500 | $ 2,562,500 | $ 1,968,200 | $ 1,872,200 | $ 1,953,900 | $ 17,989,880 | $ 8,356,783 | $ 8,153,495
Cost of revenue. | 4,553,100 | 4,422,900 | 4,403,000 | 4,075,700 | 2,433,400 | 1,859,700 | 1,784,800 | 1,875,700 | 17,454,692 | 7,953,607 | 7,703,507
Gross profit | 170,600 | 126,600 | 103,200 | 134,800 | 129,100 | 108,500 | 87,400 | 78,200 | 535,188 | 403,176 | 449,988
Equity in earnings of joint ventures | 29,900 | 27,700 | 24,700 | 23,900 | 8,400 | 6,000 | 7,400 | 36,100 | 106,245 | 57,924 | 24,319
General and administrative expenses | (25,500) | (24,400) | (29,800) | (34,300) | (15,500) | (15,100) | (26,400) | (23,900) | (113,975) | (80,908) | (97,318)
Acquisition and integration expenses | (79,800) | (88,500) | (91,600) | (138,500) | (19,500) | (7,800) |  |  | 398,440 | 27,310 |
Income from operations | 95,200 | 41,400 | 6,500 | (14,100) | 102,500 | 91,600 | 68,400 | 90,400 | 129,018 | 352,882 | 376,989
Other income | 7,400 | 10,100 | (1,000) | 2,600 | 1,900 | 1,000 | (200) | 0 | 19,139 | 2,748 | 3,522
Interest expense | (60,000) | (60,200) | (60,700) | (118,700) | (10,100) | (9,800) | (10,500) | (10,400) | (299,627) | (40,842) | (44,737)
(Loss) income before income tax (benefit) expense | 42,600 | (8,700) | (55,200) | (130,200) | 94,300 | 82,800 | 57,700 | 80,000 | (151,470) | 314,788 | 335,774
Income tax (benefit) expense | 16,100 | (8,500) | (75,800) | (12,100) | 29,600 | 13,700 | 15,200 | 23,500 | (80,237) | 82,024 | 92,578
Net (loss) income | 26,500 | (200) | 20,600 | (118,100) | 64,700 | 69,100 | 42,500 | 56,500 | (71,233) | 232,764 | 243,196
Noncontrolling interests in income of consolidated subsidiaries, net of tax | (25,400) | (17,000) | (20,300) | (20,900) | (600) | 100 | (2,300) | (100) | (83,612) | (2,910) | (3,953)
Net (loss) income attributable to AECOM | $ 1,100 | $ (17,200) | $ 300 | (139,000) | $ 64,100 | $ 69,200 | $ 40,200 | $ 56,400 | $ (154,845) | $ 229,854 | $ 239,243
Increase in amortization expense |  |  |  | 53,900 |  |  |  |  |  |  |
Adjustments to the margin fair value liability increased revenue |  |  |  | 24,500 |  |  |  |  |  |  |
Decrease in noncontrolling interest |  |  |  | $ (2,300) |  |  |  |  |  |  |
Net (loss) income attributable to AECOM per share: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.01 | $ (0.11) |  | $ (0.98) | $ 0.65 | $ 0.71 | $ 0.41 | $ 0.59 | $ (1.04) | $ 2.36 | $ 2.38
Diluted (in dollars per share) | $ 0.01 | $ (0.11) |  | $ (0.98) | $ 0.64 | $ 0.70 | $ 0.41 | $ 0.58 | $ (1.04) | $ 2.33 | $ 2.35
Weighted average shares outstanding: |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) | 153,800 | 151,700 | 151,100 | 141,900 | 98,100 | 97,500 | 97,000 | 96,300 | 149,605 | 97,226 | 100,618
Diluted (in shares) | 155,200 | 151,700 | 152,800 | 141,900 | 99,700 | 99,000 | 98,300 | 97,600 | 149,605 | 98,657 | 101,942

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