Debt Debt (Details) $ in Thousands	Sep. 30, 2015 USD ($)	Sep. 29, 2015 USD ($)	Aug. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 523,400
Notes payable bank - homebuilding operations	156,100			$ 30,000
letters of credit outstanding under credit facility	34,700
Maximum borrowing availability subject to limit	$ 209,200
Number of Secured Letters of Credit Outstanding under Credit Facility	3
Aggregate Capacity of Secured Letters of Credit under Credit Facility	$ 12,000
Uncommitted Letters of Credit	4,800
Letters of Credit Outstanding Under Letter of Credit Facilities	2,900			6,500
Restricted Cash for Secured Letter of Credit Agreements	3,000			$ 6,600
Regions Bank [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	3,000		$ 5,000
U.S. Bank [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	4,000	$ 10,000
Low Range Uncommitted Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	3,000
High Range Uncommittted Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	5,000
First Amendment to New Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Sub-limit for letters of credit	125,000
Line of Credit Facility, Current Borrowing Capacity	300,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 400,000
Maximum [Member] | New Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis Points Spread on Variable Rate - Credit Facility	250
Minimum [Member] | New Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis Points Spread on Variable Rate - Credit Facility	150