Business Segments Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 1,131,791	$ 1,142,909	$ 3,270,476	$ 3,299,393
Cost of Product and Service Sold including Impairment	861,705		2,460,988
Land and housing	854,122	833,468	2,453,405	2,397,329
General and administrative	70,766	68,285	197,086	188,363
Selling	64,049	59,163	180,490	171,598
Operating Income	135,271	181,993	431,912	542,103
Interest income	(4,548)	(6,680)	(14,122)	(20,948)
Other expense (income)	0	0	0	0
Income before income taxes	139,819	188,673	446,034	563,051
Total valuation adjustments and write-offs			1,600
Production Related Impairments or Charges	7,583		7,583	0
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	487,931	498,503	1,386,558	1,371,804
Cost of Product and Service Sold including Impairment	375,573		1,072,011
Land and housing		387,709		1,065,250
General and administrative	10,579	10,605	30,538	30,170
Selling	24,411	24,704	70,035	70,017
Operating Income	77,368	75,485	213,974	206,367
Interest income	(22)	(59)	(69)	(195)
Total valuation adjustments and write-offs			1,300
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	609,211	614,436	1,786,299	1,839,895
Cost of Product and Service Sold including Impairment	486,132		1,388,977
Land and housing		445,759		1,332,079
General and administrative	21,160	20,750	60,972	56,381
Selling	39,030	33,787	108,730	99,702
Operating Income	62,889	114,140	227,620	351,733
Interest income	(192)	(618)	(194)	(1,016)
Total valuation adjustments and write-offs			6,300
Financial Service
Segment Reporting Information [Line Items]
Revenue	34,649	29,970	97,619	87,694
Land and housing	0	0	0	0
General and administrative	14,681	13,402	41,342	38,056
Selling	0	0	0	0
Operating Income	19,968	16,568	56,277	49,638
Interest expense	(3,370)	(3,632)	(9,097)	(9,990)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
General and administrative	24,346	23,528	64,234	63,756
Selling	608	672	1,725	1,879
Selling, general and administrative expenses	(24,954)	(24,200)	(65,959)	(65,635)
Interest income	(7,704)	(9,635)	(22,956)	(29,727)
Operating Segments
Segment Reporting Information [Line Items]
General and administrative	46,420	44,757	132,852	124,607
Selling	63,441	58,491	178,765	169,719
Operating Income	160,225	206,193	497,871	607,738
Interest income	$ (3,156)	$ (2,955)	$ (8,834)	$ (8,779)