Debt Debt (Details) $ in Thousands	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 462,400
Notes payable bank - homebuilding operations	105,600	$ 30,000
letters of credit outstanding under credit facility	27,300
Maximum borrowing availability subject to limit	$ 167,100
Number of Secured Letters of Credit Outstanding under Credit Facility	3
Aggregate Capacity of Secured Letters of Credit under Credit Facility	$ 20,000
Uncommitted Letters of Credit	4,000
Letters of Credit Outstanding Under Letter of Credit Facilities	4,900	6,500
Restricted Cash for Secured Letter of Credit Agreements	5,000	$ 6,600
Low Range Uncommitted Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	5,000
High Range Uncommittted Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	10,000
First Amendment to New Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	300,000
Sub-limit for letters of credit	125,000
Line of Credit Facility, Maximum Borrowing Capacity	400,000
Warehousing Agreement - Third Amendment to Amended and Restated [Member]
Line of Credit Facility [Line Items]
Optional increase in borrowing availability	$ 20,000
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