Summary Consolidated Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Quarterly Summary of Income Statement Data [Abstract]
Revenues	$ 2,027,907	$ 1,502,909	$ 1,363,512	$ 920,730	$ 1,855,451	$ 1,269,934	$ 1,115,557	$ 928,566	$ 5,815,058	$ 5,169,508	$ 4,171,248
Gross Profit	452,075	326,881	286,071	187,728	285,684	278,518	244,986	216,255
Income before income taxes	301,747	203,574	199,209	109,781	168,160	163,653	140,397	116,817	814,311	589,027	535,562
Net income	$ 191,878	$ 148,563	$ 124,638	$ 70,416	$ 114,378	$ 105,483	$ 89,054	$ 73,180	$ 535,495	$ 382,095	$ 363,167
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 1.20	$ 0.91	$ 0.76	$ 0.43	$ 0.70	$ 0.64	$ 0.53	$ 0.42	$ 3.30	$ 2.27	$ 2.06
Earnings Per Share, Diluted	$ 1.17	$ 0.87	$ 0.73	$ 0.42	$ 0.67	$ 0.61	$ 0.51	$ 0.40	$ 3.17	$ 2.18	$ 1.97
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted-average shares	159,232	163,478	163,492	162,588	163,970	165,919	168,952	174,205	162,222	168,261	176,425
Weighted Average Number of Shares Outstanding, Diluted	164,565	171,562	171,403	170,417	171,683	173,405	176,414	182,391	169,487	175,973	184,703
Summary Consolidated Quarterly Financial Data (Textual) [Abstract]
Stucco, Construction Claims, And Litigation Charge										$ 121,200