Debt Debt (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount	$ 419,200,000
Notes payable bank - homebuilding operations	90,000,000	30,000,000
letters of credit outstanding under credit facility	29,100,000
Maximum borrowing availability subject to limit	180,900,000
Number of Secured Letters of Credit Outstanding under Credit Facility	3
Aggregate Capacity of Secured Letters of Credit under Credit Facility	20,000,000
Uncommitted Letters of Credit	3,800,000
Letters of Credit Outstanding Under Letter of Credit Facilities	5,900,000	6,500,000
Restricted Cash for Secured Letter of Credit Agreements	6,000,000	6,600,000
Low Range Uncommitted Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	5,000,000
High Range Uncommittted Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum available amounts under Letter of Credit Facilities	10,000,000
First Amendment to New Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	300,000,000
Sub-limit for letters of credit	125,000,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 400,000,000
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