Business Segments Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenue	$ 1,014,013	$ 1,040,654	$ 2,014,543	$ 1,901,465
Operating Income	150,659	182,865	285,245	305,770
Interest expense		693		1,364
Interest income	(4,670)		(6,059)
Equity in loss (income) from joint venture arrangements	(28)	(1)	(35)	(17)
Income before income taxes	155,357	182,173	291,339	304,423
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	383,886	472,814	766,616	826,600
Operating Income	46,853	74,078	86,013	114,294
Interest expense		0		0
Interest income	(47)		(93)
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	604,861	548,466	1,197,380	1,031,380
Operating Income	109,912	120,024	207,524	204,317
Interest income	(203)	0	(205)	(2)
Financial Service
Segment Reporting Information [Line Items]
Revenue	25,266	19,374	50,547	43,485
Operating Income	13,743	9,608	28,711	23,541
Interest expense	2,584	941	4,911	1,819
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative expenses	(19,849)	(20,845)	(37,003)	(36,382)
Interest income	$ (7,004)	$ (248)	$ (10,672)	$ (453)