Business Segments Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 860,811	$ 828,776
Operating Income	122,905	111,297
Interest Expense	671	1,176
Equity in loss (income) from joint venture arrangements	(16)	(160)
Income before income taxes	122,250	110,281
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	353,786	332,998
Operating Income	40,216	38,984
Interest Expense	0	76
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	482,914	466,129
Operating Income	84,293	66,215
Interest Expense		157
Interest income	(2)
Financial Service
Segment Reporting Information [Line Items]
Revenue	24,111	29,649
Operating Income	13,933	20,636
Interest Expense	878	943
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Selling, general and administrative expenses	(15,537)	(14,538)
Interest Income	$ (205)	$ 0