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Commitments and Contingencies Warranty Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Warranty Accrual Rollforward [Abstract]        
Warranty reserves, beginning of period $ 24,980 $ 15,295 $ 27,732 $ 14,281
Warranty expense on homes delivered during the period 2,783 2,482 5,212 4,522
Changes in estimates for pre-existing warranties 332 (646) 1,062 37
Charges related to stucco-related claims 8,500 2,754 8,500 4,909
Settlements made during the period (6,292) (4,070) (12,203) (7,934)
Warranty reserves, end of period $ 30,303 $ 15,815 $ 30,303 $ 15,815