Debt Debt (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 1,140,000		$ 1,140,000
Notes payable bank - homebuilding operations	0		0
letters of credit outstanding under credit facility	81,100		81,100
Maximum borrowing availability subject to limit	468,900		$ 468,900
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Fourth Amendment to Credit Facility Initiation Date			Jun. 10, 2021
Line of Credit Facility, Current Borrowing Capacity	$ 550,000	$ 500,000	$ 550,000
Line of Credit Facility, Expiration Date	Jul. 18, 2025
Minimum Net Worth Required for Compliance	$ 946,200	$ 848,200	946,200
Line of Credit Facility, Maximum Borrowing Capacity	$ 700,000		700,000
Libor Floor	0.25%	0.75%
Sub-limit for letters of credit	$ 150,000	$ 125,000	$ 150,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.30%
Commitment Fee Decrease	0.15%		0.15%
Basis point spread on variable rate under Credit Facility	1.75%		1.75%
Libor decrease for fourth Amendment	0.75%		0.75%
2028 Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 400,000		$ 400,000
Debt Instrument, Interest Rate, Stated Percentage	4.95%		4.95%
2025 Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 250,000		$ 250,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%		5.625%