Debt Debt (Details) $ in Thousands	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 654,100
Notes payable bank - homebuilding operations	218,800	$ 117,400
letters of credit outstanding under credit facility	59,300
Maximum borrowing availability subject to limit	221,900
Second Amendment to Credit Facility [Member]
Line of Credit Facility [Line Items]
Sub-limit for letters of credit	125,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 500,000
Basis Points Spread on Variable Rate - Credit Facility	250
2025 Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 250,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%
2021 Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 300,000
Debt Instrument, Interest Rate, Stated Percentage	6.75%