Summary Consolidated Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Quarterly Summary of Income Statement Data [Abstract]
Revenues	$ 1,350,690	$ 1,056,857	$ 860,374	$ 643,681	$ 1,044,534	$ 689,160	$ 516,004	$ 424,601	$ 3,911,602	$ 2,674,299	$ 1,882,781
Gross Profit	288,115	239,625	172,376	129,649	222,273	144,071	95,991	78,664
Income before income taxes	188,538	151,325	93,484	71,235	150,150	68,253	40,968	8,326	504,582	267,697	112,942
Net income	131,524	97,707	65,222	45,580	94,905	46,595	24,674	4,432	340,032	170,606	487,146
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 0.74	$ 0.55	$ 0.37	$ 0.26	$ 0.56	$ 0.28	$ 0.15	$ 0.03	$ 1.91	$ 1.01	$ 2.91
Earnings Per Share, Diluted	$ 0.71	$ 0.53	$ 0.35	$ 0.25	$ 0.54	$ 0.26	$ 0.14	$ 0.03	$ 1.84	$ 0.97	$ 2.86
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted-average shares	177,540	178,217	178,082	176,474	169,440	169,268	169,380	169,064	177,578	169,288	167,346
Weighted Average Number of Shares Outstanding, Diluted	185,669	186,501	186,442	184,888	177,952	178,001	178,136	171,903	185,875	177,963	170,154
Summary Consolidated Quarterly Financial Data (Textual) [Abstract]
Stucco, Construction Claims, And Litigation Charge	$ 32,000