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Basis of Presentation and Significant Accounting Policies (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
segment
Sep. 30, 2016
USD ($)
segment
Mar. 31, 2016
Jan. 01, 2015
Class of Stock [Line Items]            
Ownership Percentage by Parent Included in Consolidation     50.00%      
Salary expense $ 5,218 $ 5,256 $ 15,985 $ 15,886    
Number of reportable segments | segment     2 2    
Number of operating segments | segment     3 2    
Ownership percentage by parent 50.00%   50.00%      
Ownership percentage by noncontrolling owners 50.00%   50.00%      
Selling, general and administrative expense $ 4,302 $ 4,130 $ 12,747 $ 12,275    
Centre Living            
Class of Stock [Line Items]            
Ownership percentage by parent           50.00%
Ownership percentage by noncontrolling owners           50.00%
Ownership percent           51.00%
Builder Operations            
Class of Stock [Line Items]            
Percentage of total revenue 95.40% 96.10%   95.30%    
Academy Street | Investee            
Class of Stock [Line Items]            
Ownership percentage by parent         80.00%  
Ownership percentage by noncontrolling owners         20.00%  
Change in Classification of Indirect Project Costs            
Class of Stock [Line Items]            
Salary expense   $ (1,300)   $ (3,600)    
Selling, general and administrative expense   $ (300)   $ (700)    
Accounting Standards Update 2014-09 | Builder Operations            
Class of Stock [Line Items]            
Percentage of total revenue     95.00%