Business Segments Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenue	$ 4,417,781	$ 4,504,670	$ 4,033,502
Land and Housing	3,400,582	3,305,781	3,014,573
General and administrative	262,766	258,422	222,765
Selling	247,880	234,373	208,942
Operating income (loss):	506,553	706,094	587,222
Interest Expense			(20,022)
Interest Income, net of Interest Expense	(20,035)	(27,514)	20,022
Other Income	0	0	(33)
Income before income taxes	526,588	733,608	607,277
Depreciation and amortization:	18,898	17,386	15,791
Total valuation adjustments and write-offs	47,700
Charges related to stucco-related claims	11,162	0	0
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	1,890,457	1,900,013	1,523,943
Land and Housing	1,475,438	1,480,326	1,228,949
General and administrative	41,103	42,908	36,827
Selling	95,860	95,680	81,847
Operating income (loss):	278,056	281,099	176,320
Interest Income, net of Interest Expense	(70)	(228)	(186)
Depreciation and amortization:	3,723	3,787	3,673
Total valuation adjustments and write-offs	6,700
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	2,401,861	2,488,451	2,415,730
Land and Housing	1,925,144	1,825,455	1,785,624
General and administrative	77,291	76,200	65,078
Selling	149,457	136,198	124,860
Operating income (loss):	249,969	450,598	440,168
Interest Income, net of Interest Expense	(3,076)	(2,554)	(1,703)
Depreciation and amortization:	4,616	3,636	2,965
Total valuation adjustments and write-offs	41,000
Financial Service
Segment Reporting Information [Line Items]
Revenue	125,463	116,206	93,829
Land and Housing	0	0	0
General and administrative	57,303	52,826	45,115
Selling	0	0	0
Operating income (loss):	68,160	63,380	48,714
Interest Expense	12,504	13,698	10,360
Depreciation and amortization:	1,177	1,130	810
Operating Segments
Segment Reporting Information [Line Items]
General and administrative	175,697	171,934	147,020
Selling	245,317	231,878	206,707
Operating income (loss):	596,185	795,077	665,202
Interest Income, net of Interest Expense	(9,358)	(10,916)	(8,471)
Depreciation and amortization:	9,516	8,553	7,448
Corporate and Other [Member]
Segment Reporting Information [Line Items]
General and administrative	87,069	86,488	75,745
Selling	2,563	2,495	2,235
Less: Corporate selling, general and administrative expenses	(89,632)	(88,983)	(77,980)
Interest and Other Income	(29,393)	(38,430)	(28,493)
Depreciation and amortization:	$ 9,382	$ 8,833	$ 8,343