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Commitments and Contingencies Legal Liabilities (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other Liabilities Disclosure [Abstract]              
Product Liability Accrual, Component Amount         $ 8,800,000 $ 19,400,000 $ 500,000
Charges related to stucco-related claims $ 8,500,000 $ 2,754,000 $ 8,500,000 $ 4,909,000      
Estimated Repair Costs for Affected Homes 14,100,000   14,100,000        
Amount Reserved for Legal Expenses 400,000   400,000     $ 300,000  
General Liability Insurance Deductible 10,000,000   10,000,000   7,500,000    
Workers Compensation $ 250,000   $ 250,000   $ 500,000