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Note 2 - Recently Issued Accounting Standards - Cumulative Effect of the Changes Made to Consolidated Balance Sheet (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Deferred tax asset, net $ 40,500   $ 41,500
Retained earnings 285,829 $ 263,930 258,164
Accumulated other comprehensive income 3,992
Accounting Standards Update 2018-02 [Member]      
Retained earnings   (860)  
Accumulated other comprehensive income   860  
Accounting Standards Update 2016-01 [Member]      
Retained earnings   4,852  
Accumulated other comprehensive income   (4,852)  
Accounting Standards Update 2014-09 [Member]      
Retained earnings   1,774  
Accumulated other comprehensive income    
Homebuilding Segment [Member]      
Housing completed or under construction 1,009,197 944,091 936,685
Property and equipment, net 53,368 51,709 26,439
Prepaid and other assets 38,015 41,439 75,666
Deferred tax asset, net 40,484 40,907 41,480
Other assets 1,926   1,220
Homebuilding Segment [Member] | Accounting Standards Update 2018-02 [Member]      
Housing completed or under construction    
Property and equipment, net    
Prepaid and other assets    
Deferred tax asset, net    
Homebuilding Segment [Member] | Accounting Standards Update 2016-01 [Member]      
Housing completed or under construction    
Property and equipment, net    
Prepaid and other assets    
Deferred tax asset, net    
Homebuilding Segment [Member] | Accounting Standards Update 2014-09 [Member]      
Housing completed or under construction   7,406  
Property and equipment, net   25,270  
Prepaid and other assets   (34,227)  
Deferred tax asset, net   (573)  
Financial Services Segment [Member]      
Other assets $ 17,062 13,515 $ 9,617
Financial Services Segment [Member] | Accounting Standards Update 2018-02 [Member]      
Other assets    
Financial Services Segment [Member] | Accounting Standards Update 2016-01 [Member]      
Other assets    
Financial Services Segment [Member] | Accounting Standards Update 2014-09 [Member]      
Other assets   $ 3,898