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Business Segments Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 904,319 | $ 847,921 | $ 2,694,135 | $ 2,139,718
Operating Income | 125,220 | 96,096 | 378,231 | 216,339
Interest Expense |  | 1,239 | 1,554 | 8,454
Interest income | (74) |  |  |
Equity in loss (income) from joint venture arrangements | 50 | (252) | (145) | (307)
Gain (Loss) on Extinguishment of Debt | 9,072 | 0 | 9,072 | 0
Income before income taxes | 116,172 | 95,109 | 367,750 | 208,192
Northern Homebuilding [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 400,564 | 350,591 | 1,151,349 | 890,201
Operating Income | 59,009 | 38,365 | 159,975 | 91,487
Interest Expense | 0 | 122 | 76 | 2,636
Southern Homebuilding [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 482,960 | 468,384 | 1,463,707 | 1,188,056
Operating Income | 72,957 | 55,861 | 218,236 | 129,037
Interest Expense |  | 409 |  | 3,759
Interest income | (381) |  | (224) |
Financial Services Sector [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 20,795 | 28,946 | 79,079 | 61,461
Operating Income | 10,820 | 19,887 | 50,381 | 37,706
Interest Expense | 885 | 708 | 2,777 | 2,059
Corporate and Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Selling, general and administrative expenses | (17,566) | (18,017) | (50,361) | (41,891)
Interest Income | $ (578) | $ 0 | $ (1,075) | $ 0

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