Business Segments Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 1,109,781	$ 1,014,013	$ 2,156,484	$ 2,014,543
Operating Income	186,791	150,659	360,110	285,245
Interest income	(7,348)	(4,670)	(14,268)	(6,059)
Other expense (income)	0	(28)	0	(35)
Income before income taxes	194,139	155,357	374,378	291,339
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	464,781	383,886	873,301	766,616
Operating Income	72,821	46,853	130,882	86,013
Interest income	(56)	(47)	(136)	(93)
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	614,238	604,861	1,225,459	1,197,380
Operating Income	119,750	109,912	237,593	207,524
Interest income	0	(203)	(398)	(205)
Financial Service
Segment Reporting Information [Line Items]
Revenue	30,762	25,266	57,724	50,547
Operating Income	17,883	13,743	33,070	28,711
Interest expense	(3,483)	(2,584)	(6,358)	(4,911)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative expenses	(23,663)	(19,849)	(41,435)	(37,003)
Interest income	$ (10,775)	$ (7,004)	$ (20,092)	$ (10,672)