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Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
state
brand
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
state
brand
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Jan. 01, 2019
USD ($)
Dec. 31, 2015
shares
Debt Instrument [Line Items]              
Number of quality brands in portfolio | brand 6   6        
Number of states in which entity operates | state 10   10        
Common stock, par value (in dollars per share) | $ / shares $ 0.01 $ 0.01 $ 0.01 $ 0.01      
Common stock issued and outstanding - historical (shares) | shares 141,661,713 151,162,999 141,661,713 151,162,999      
Common stock outstanding (shares) | shares 141,661,713 151,162,999 141,661,713 151,162,999      
Impairment charges     $ 0 $ 854,000 $ 0    
Impairment of investments in unconsolidated entities     0 13,200,000 0    
Gross unrecognized tax benefits $ 1,014,000 $ 1,521,000 1,014,000 1,521,000 $ 0    
Reduction in deferred tax asset   $ 22,000,000 $ (740,000) $ 22,000,000      
Common Stock [Member]              
Debt Instrument [Line Items]              
Common stock outstanding (shares) | shares 141,661,713 151,162,999 141,661,713 151,162,999 158,626,229   161,813,750
Dallas-based homebuilder [Member]              
Debt Instrument [Line Items]              
Cash payment to acquire homebuilder $ 61,500,000            
ASU 2016-02 [Member] | Expected impact [Member]              
Debt Instrument [Line Items]              
Expected increase in lease asset           $ 58,000,000  
Expected increase in lease liability           $ 57,000,000