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Equity - Vesting Schedule of the Nonvested Shares of Restricted Stock Outstanding (Detail) - shares
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance period 3 years  
Restricted Common Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 333,128 287,827
Restricted Common Stock | April 1, 2017 - December 31, 2017    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 133,226  
Restricted Common Stock | 2018    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 79,201  
Restricted Common Stock | 2019    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 57,886  
Restricted Common Stock | 2020    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 41,501  
Restricted Common Stock | 2021    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 21,314  
LTIP Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 241,691 241,691
LTIP Units | April 1, 2017 - December 31, 2017    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 70,837  
LTIP Units | 2018    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 70,842  
LTIP Units | 2019    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 70,838  
LTIP Units | 2020    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 29,174  
LTIP Units | 2021    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 0  
Performance Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 514,998 514,998
TSR performance percentage relative to peer group 75.00%  
Performance period 3 years  
Performance Units | April 1, 2017 - December 31, 2017    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 0  
Performance Units | 2018    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 315,998  
Performance Units | 2019    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 199,000  
Performance Units | 2020    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 0  
Performance Units | 2021    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested shares 0