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Summary Consolidated Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 29, 2024
Oct. 31, 2024
Jul. 31, 2024
Apr. 30, 2024
Jan. 31, 2024
Oct. 31, 2023
Jul. 31, 2023
Apr. 30, 2023
Jan. 31, 2023
Oct. 31, 2024
Oct. 31, 2023
Oct. 31, 2022
Quarterly Summary of Income Statement Data [Abstract]                        
Revenue from Contract with Customer, Including Assessed Tax                   $ 10,846,740 $ 9,994,937 $ 10,275,558
Income (loss) before income taxes   $ 621,073 $ 503,627 $ 649,779 $ 311,161 $ 604,966 $ 553,017 $ 430,592 $ 253,796 2,085,640 1,842,371 1,703,726
Net income   $ 475,409 $ 374,611 $ 481,617 $ 239,558 $ 445,536 $ 414,789 $ 320,216 $ 191,530 $ 1,571,195 $ 1,372,071 $ 1,286,500
Earnings Per Share [Abstract]                        
Basic earnings (in dollars per share)   $ 4.67 $ 3.64 $ 4.60 $ 2.28 $ 4.15 $ 3.77 $ 2.88 $ 1.72 $ 15.16 $ 12.47 $ 11.02
Diluted earnings (in dollars per share)   $ 4.63 $ 3.60 $ 4.55 $ 2.25 $ 4.11 $ 3.73 $ 2.85 $ 1.70 $ 15.01 $ 12.36 $ 10.90
Weighted Average Number of Shares Outstanding, Diluted [Abstract]                        
Basic weighted-average shares   101,716 102,980 104,794 105,122 107,465 110,003 111,214 111,397 103,653 110,020 116,771
Weighted Average Number of Shares Outstanding, Diluted   102,676 104,014 105,803 106,265 108,388 111,123 112,184 112,336 104,690 111,008 117,975
Mid-Atlantic [Member]                        
Quarterly Summary of Income Statement Data [Abstract]                        
Revenue from Contract with Customer, Including Assessed Tax                   $ 1,422,018 $ 1,175,348 $ 1,148,966
Income (loss) before income taxes                   471,478 243,464 189,485
Home Building [Member]                        
Quarterly Summary of Income Statement Data [Abstract]                        
Revenue from Contract with Customer, Including Assessed Tax   $ 3,260,004 $ 2,724,472 $ 2,647,020 $ 1,931,836 $ 2,951,904 $ 2,674,602 $ 2,490,098 $ 1,749,422 10,563,332 9,866,026 9,711,170
Gross Profit   846,324 747,310 683,737 532,610 810,375 742,653 657,220 448,499      
Land [Member]                        
Quarterly Summary of Income Statement Data [Abstract]                        
Revenue from Contract with Customer, Including Assessed Tax   73,458 3,472 190,466 16,012 68,243 13,040 16,881 30,747 283,408 128,911 564,388
Gross Profit   $ 34,465 $ (5,306) 177,487 $ 5,851 $ (10,351) $ 1,462 $ (3,969) $ (11,688)      
Land [Member] | Mid-Atlantic [Member]                        
Quarterly Summary of Income Statement Data [Abstract]                        
Revenue from Contract with Customer, Including Assessed Tax $ 185,000     185,000           $ 208,436 $ 13,169 $ 38,423
Gross Profit       $ 124,100