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Note 7 - Inventories - Fair Value of Impaired Inventory (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Impairment Data; Inventory Impairments         $ 4,850 $ 1,600
Minimum [Member]            
Quantitative Data; Discount Rate         5.00%  
Maximum [Member]            
Quantitative Data; Discount Rate         12.00%  
Homebuilding Segment [Member]            
Impairment Data; Number of Subdivisions Impaired   2 2      
Impairment Data; Total Subdivisions Tested 35 33 17 14    
Impairment Data; Inventory Impairments $ 4,850 $ 1,600   $ 4,850 $ 1,600
Impairment Data; Fair Value of Inventory After Impairments   $ 19,952 $ 6,415      
Homebuilding Segment [Member] | Minimum [Member]            
Quantitative Data; Discount Rate   12.00% 12.00%      
Homebuilding Segment [Member] | Maximum [Member]            
Quantitative Data; Discount Rate   18.00% 15.00%