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Debt And Lines Of Credit , Narrative - Line of Credit (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2015
Mar. 31, 2017
Dec. 31, 2016
Line of Credit Facility [Line Items]      
Lines of credit   $ 178,328 $ 100,095
Weighted average interest rate   4.50% 4.50%
Debt weighted average to maturity, length   8 years 2 months 12 days 8 years 6 months
Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Current Borrowing Capacity $ 450,000    
Line of credit, borrowing capacity $ 750,000    
Debt Instrument, Maturity Date Aug. 19, 2019    
Line of credit, additional borrowing capacity $ 300,000    
Interest rate   2.52% 2.14%
Lines of credit   $ 178,600 $ 100,300
Letters of credit outstanding, amount   4,300 4,600
Line of credit - manufactured home floor plan facility [Member]      
Line of Credit Facility [Line Items]      
Line of credit, borrowing capacity   12,000  
Lines of credit   $ 1,900 2,800
Weighted average interest rate   7.00%  
Prime Rate [Member] | Line of credit - manufactured home floor plan facility [Member]      
Line of Credit Facility [Line Items]      
Effective interest rate, maximum   6.00%  
Basis points   100.00%  
Revolving Credit Facility [Member]      
Line of Credit Facility [Line Items]      
Line of credit, borrowing capacity $ 392,000    
Debt instrument, face amount   $ 120,600 42,300
Lines of credit   $ 178,328 $ 100,095
Revolving Credit Facility [Member] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Weighted average interest rate   2.50% 2.10%
Debt weighted average to maturity, length   3 years 4 months 24 days 3 years 7 months 6 days
Revolving Credit Facility [Member] | Eurodollar [Member] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Effective interest rate, minimum 1.40%    
Effective interest rate, maximum 2.25%    
Line of credit variable interest rate   1.40%  
Term Loan [Member]      
Line of Credit Facility [Line Items]      
Line of credit, borrowing capacity $ 58,000    
Term Loan [Member] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Lines of credit   $ 58,000  
Term Loan [Member] | Eurodollar [Member] | Line of Credit [Member]      
Line of Credit Facility [Line Items]      
Effective interest rate, minimum 1.35%    
Effective interest rate, maximum 2.20%    
Line of credit variable interest rate   1.35%