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Acquisition and Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Business Acquisition [Line Items]        
Acquisition, net of cash acquired   $ 0 $ (100,960)  
Goodwill   16,400   $ 16,400
Pinnacle Homes [Member]        
Business Acquisition [Line Items]        
Acquisition, net of cash acquired $ (101,000)      
Goodwill   $ 16,400    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets $ 84,600