Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Revenues	$ 1,363,512	$ 1,115,557	$ 2,284,242	$ 2,044,123
Cost of revenues	1,077,441	870,571	1,810,443	1,582,882
Selling, general and administrative	147,876	128,340	284,971	250,136
Total	1,225,317	998,911	2,095,414	1,833,018
Income from operations	138,195	116,646	188,828	211,105
Other:
Income from unconsolidated entities	45,904	9,118	92,349	17,756
Other income - net	15,110	14,633	27,813	28,353
Income before income taxes	199,209	140,397	308,990	257,214
Income tax provision (benefit)	74,571	51,343	113,936	94,980
Net income	124,638	89,054	195,054	162,234
Other comprehensive (loss) income, net of tax:
Change in pension liability	168	155	337	(132)
Change in unrealized income (loss) on derivative held by equity investee		4		31
Other comprehensive (loss) income	168	159	337	(101)
Total comprehensive income	$ 124,806	$ 89,213	$ 195,391	$ 162,133
Income per share:
Basic	$ 0.76	$ 0.53	$ 1.20	$ 0.95
Diluted	0.73	0.51	1.15	0.91
Cash dividend declared	$ 0.08		$ 0.08
Weighted average number of shares:
Basic	163,492	168,952	163,040	171,578
Diluted	171,403	176,414	170,910	179,403