Guarantees and Indemnifications Warranty Rollforward (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Warranty Accrual Rollforward [Abstract]
Warranty reserves, beginning of period	$ 11,769	$ 10,400	$ 12,291	$ 10,438
Warranty expense on homes delivered during the period	1,680	1,667	3,039	3,005
Changes in estimates for pre-existing warranties	652	101	890	101
Settlements made during the period	(2,881)	(1,780)	(5,000)	(3,156)
Warranty reserves, end of period	$ 11,220	$ 10,388	$ 11,220	$ 10,388