XML 101 R84.htm IDEA: XBRL DOCUMENT v3.3.1.900
Non-controlling Interests - Additional Information (Detail) - USD ($)
7 Months Ended 12 Months Ended
Mar. 05, 2014
Jul. 31, 2014
Dec. 31, 2013
Noncontrolling Interest [Line Items]      
Investment in equity investments   $ 48,154,000 $ 30,341,000
Decrease in non-controlling interest due to property sale   3,764,000  
Increase in non-controlling interest due to consolidation of property   $ 16,391,000  
River City [Member]      
Noncontrolling Interest [Line Items]      
Decrease in non-controlling interest due to property sale $ 3,764,000    
Norridge [Member]      
Noncontrolling Interest [Line Items]      
Increase in non-controlling interest due to consolidation of property $ 16,391,000    
Westheimer [Member] | Houston, Texas Operating Property [Member]      
Noncontrolling Interest [Line Items]      
Percentage of non-controlling ownership interest   32.00% 2.00%
Investment in equity investments     $ 150,000
Purchase price accounting, carrying value of the acquired non-controlling interest   $ 253,000  
Purchase price accounting, adjustments in paid-in capital   $ 103,000