Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Revenues	$ 1,115,557	$ 852,583	$ 2,044,123	$ 1,706,035
Cost of revenues	870,571	678,512	1,582,882	1,328,544
Selling, general and administrative	128,340	107,685	250,136	213,999
Total	998,911	786,197	1,833,018	1,542,543
Income from operations	116,646	66,386	211,105	163,492
Other:
Income from unconsolidated entities	9,118	6,227	17,756	11,128
Other income - net	14,633	13,919	28,353	35,935
Income before income taxes	140,397	86,532	257,214	210,555
Income tax provision (benefit)	51,343	18,602	94,980	61,300
Net income	89,054	67,930	162,234	149,255
Other comprehensive (loss) income, net of tax:
Change in pension liability	$ 155	$ (23)	$ (132)	(201)
Change in fair value of available-for-sale securities				2
Change in unrealized income (loss) on derivative held by equity investee	$ 4	$ (7)	$ 31	(14)
Other comprehensive (loss) income	159	(30)	(101)	(213)
Total comprehensive income	$ 89,213	$ 67,900	$ 162,133	$ 149,042
Income per share:
Basic	$ 0.53	$ 0.38	$ 0.95	$ 0.85
Diluted	$ 0.51	$ 0.37	$ 0.91	$ 0.81
Weighted average number of shares:
Basic	168,952	176,458	171,578	176,267
Diluted	176,414	184,838	179,403	184,472