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Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 22 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
May 23, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, expense $ 8,608,000 $ 9,795,000 $ 18,536,000 $ 18,178,000  
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period     3 years    
Share-based payment arrangement, expense 5,523,000 7,975,000 $ 11,669,000 14,270,000  
Performance Shares | Equity Incentive Plan 2011 | Granted in 2016          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, expense     1,800,000    
Performance Shares | Equity Incentive Plan 2011 | Granted In 2017          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, expense   $ 5,500,000 1,400,000 10,000,000.0  
Performance Shares | Equity Incentive Plan 2011 | Granted in 2018          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, expense 1,300,000   6,000,000.0 2,500,000  
Performance Shares | Equity Incentive Plan 2011 | Granted in 2019          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, expense $ 4,200,000   4,200,000 $ 0  
Performance Shares | Equity Incentive Plan 2011 | Granted in 2020          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement, expense     $ 0    
Performance Shares | Equity Incentive Plan 2011 | 5% to 10% Vesting Threshold          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of target goal number of shares         50.00%
Performance Shares | Equity Incentive Plan 2011 | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Average gross margin of home sales, percentage, minimum         15.00%
Percentage of performance revenues that exceed base revenues         10.00%
Performance Shares | Equity Incentive Plan 2011 | Minimum | 5% to 10% Vesting Threshold          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of performance revenues that exceed base revenues         5.00%
Performance Shares | Equity Incentive Plan 2011 | Minimum | 20% Vesting Threshold          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of performance revenues that exceed base revenues         20.00%
Performance Shares | Equity Incentive Plan 2011 | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of performance revenues that exceed base revenues         20.00%
Performance Shares | Equity Incentive Plan 2011 | Maximum | 5% to 10% Vesting Threshold          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of performance revenues that exceed base revenues         10.00%
Performance Shares | Equity Incentive Plan 2011 | Maximum | 20% Vesting Threshold          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of target goal number of shares         200.00%