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Commitments and Contingencies Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2018
Warranty Accrual Rollforward [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
A summary of warranty activity for the three months ended March 31, 2018 and 2017 is as follows:
 
Three Months Ended March 31,
(In thousands)
2018
 
2017
Warranty reserves, beginning of period
$
26,133

 
$
27,732

Warranty expense on homes delivered during the period
2,542

 
2,429

Changes in estimates for pre-existing warranties
(91
)
 
730

Settlements made during the period
(4,283
)
 
(5,911
)
Warranty reserves, end of period
$
24,301

 
$
24,980