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Derivative Financial Instruments - Additional Information (Details)
3 Months Ended 9 Months Ended
Mar. 31, 2016
USD ($)
swap
Sep. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Jun. 17, 2016
USD ($)
Feb. 25, 2016
USD ($)
Dec. 31, 2015
USD ($)
Derivatives              
Interest rate agreement, notional amount       $ 326,950,000     $ 303,639,000
Interest Rate Caps              
Derivatives              
Interest rate agreement, notional amount       270,000,000     246,546,000
Interest Rate Swaps              
Derivatives              
Interest rate agreement, notional amount       $ 56,950,000     $ 57,093,000
Number of interest rate swaps hedge relationship terminated (swap) | swap 2            
Amount of AOCI recognized into earnings $ 700,000            
Amount previously allocated to noncontrolling interest recognized in earnings $ 400,000            
Overstated net income   $ 600,000 $ 1,000,000        
LIBOR | Interest Rate Caps | Operating Partnership              
Derivatives              
Interest rate agreement, notional amount         $ 70,000,000 $ 75,000,000.0  
Interest rate cap agreement, strike price         1.00% 1.50%  
LIBOR | Interest Rate Caps | Operating Partnership | Maximum              
Derivatives              
Interest rate cap agreement, premium (less than)         $ 100,000 $ 100,000