Debt Debt (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	Jul. 18, 2021
letters of credit outstanding under credit facility	$ 52,696
Debt Instrument, Unused Borrowing Capacity, Amount	587,108
Notes payable bank - homebuilding operations	117,400	$ 0
Maximum borrowing availability subject to limit	329,900
Minimum Tangible Net Worth	$ 531,700
Leverage ratio	60.00%
Letters of Credit Outstanding Under Letter of Credit Facilities	$ 0	600
Aggregate Capacity of Secured Letters of Credit under Credit Facility		1,000
Restricted Cash for Secured Letter of Credit Agreements	0	$ 600
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
Maximum [Member] | Second Amendment to Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis Points Spread on Variable Rate - Credit Facility	250
Consolidated EBITDA [Member]
Line of Credit Facility [Line Items]
Interest Coverage Ratio	1.50
Consolidated Interest Incurred [Member]
Line of Credit Facility [Line Items]
Interest Coverage Ratio	1.00
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%