Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Revenues	$ 1,599,199	$ 1,363,512	$ 2,774,667	$ 2,284,242
Cost of revenues	1,298,157	1,077,441	2,232,637	1,810,443
Selling, general and administrative	166,652	146,752	323,919	283,847
Total	1,464,809	1,224,193	2,556,556	2,094,290
Income from operations	134,390	139,319	218,111	189,952
Other:
Income from unconsolidated entities	2,564	45,904	41,444	92,349
Other income - net	15,794	13,986	24,791	26,689
Income before income taxes	152,748	199,209	284,346	308,990
Income tax provision	40,938	74,571	40,429	113,936
Net income	111,810	124,638	243,917	195,054
Other comprehensive (loss) income, net of tax:
Other comprehensive (loss) income, net	170	168	341	337
Total comprehensive income	$ 111,980	$ 124,806	$ 244,258	$ 195,391
Per share:
Basic earnings	$ 0.73	$ 0.76	$ 1.58	$ 1.20
Diluted earnings	0.72	0.73	1.55	1.15
Cash dividends declared	$ 0.11	$ 0.08	$ 0.19	$ 0.08
Weighted average number of shares:
Basic	152,731	163,492	154,306	163,040
Diluted	155,129	171,403	157,013	170,910