Business Segments Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenue	$ 1,046,703	$ 1,000,530
Operating Income	173,319	134,586
Interest income	(6,920)	(1,389)
Other expense (income)	0	(7)
Income before income taxes	180,239	135,982
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	408,520	382,730
Operating Income	58,061	39,160
Interest income	(80)	(46)
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	611,221	592,519
Operating Income	117,843	97,612
Interest income	(398)	(2)
Financial Service
Segment Reporting Information [Line Items]
Revenue	26,962	25,281
Operating Income	15,187	14,968
Interest expense	2,875	2,327
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative expenses	(17,772)	(17,154)
Interest income	$ (9,317)	$ (3,668)