Business Segments Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Revenue	$ 1,040,654	$ 961,040	$ 1,901,465	$ 1,789,816
Operating Income	182,865	141,714	305,770	253,011
Interest Expense	693	452	1,364	1,628
Equity in loss (income) from joint venture arrangements	(1)	(35)	(17)	(195)
Income before income taxes	182,173	141,297	304,423	251,578
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	472,814	417,787	826,600	750,785
Operating Income	74,078	61,982	114,294	100,966
Interest Expense	0	0	0	76
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	548,466	514,618	1,031,380	980,747
Operating Income	120,024	79,064	204,317	145,279
Interest Expense		0		157
Interest income	0		(2)
Financial Service
Segment Reporting Information [Line Items]
Revenue	19,374	28,635	43,485	58,284
Operating Income	9,608	18,925	23,541	39,561
Interest Expense	941	949	1,819	1,892
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative expenses	(20,845)	(18,257)	(36,382)	(32,795)
Interest Income	$ (248)	$ (497)	$ (453)	$ (497)