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Derivative Financial Instruments - Additional Information (Details)
12 Months Ended
Feb. 01, 2017
USD ($)
Feb. 20, 2015
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Feb. 07, 2017
USD ($)
Jun. 17, 2016
USD ($)
Mar. 31, 2016
swap
Feb. 25, 2016
USD ($)
Oct. 26, 2015
USD ($)
Jul. 13, 2015
USD ($)
Mar. 14, 2014
USD ($)
Derivatives                      
Interest rate agreement, notional amount     $ 326,901,000 $ 303,639,000              
Senior Unsecured Term Loan Facility                      
Derivatives                      
Aggregate capacity under the credit facility   $ 50,000,000.0                  
Interest rate swaps                      
Derivatives                      
Interest rate agreement, notional amount     56,901,000 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       1,000,000              
Interest rate swaps | Subsequent Event                      
Derivatives                      
Loss on termination of North Point Center Note interest rate swap $ 0                    
Interest rate caps                      
Derivatives                      
Interest rate agreement, notional amount     $ 270,000,000 $ 246,546,000              
Interest rate caps | Subsequent Event                      
Derivatives                      
Interest rate agreement, notional amount         $ 50,000,000            
Interest rate cap agreement, strike price         1.50%            
Interest rate cap agreement, premium         $ 200,000            
One Month Libor | Senior Unsecured Term Loan Facility | Minimum                      
Derivatives                      
Stated interest rate, basis spread on variable rate   1.35%                  
One Month Libor | Senior Unsecured Term Loan Facility | Maximum                      
Derivatives                      
Stated interest rate, basis spread on variable rate   1.95%                  
One Month Libor | Interest rate swaps                      
Derivatives                      
Interest rate agreement, notional amount   $ 50,000,000.0               $ 6,500,000.0  
Fixed rate interest rate swap   2.00%               3.05%  
LIBOR | Senior Unsecured Term Loan Facility | Minimum                      
Derivatives                      
Stated interest rate, basis spread on variable rate     1.35%                
LIBOR | Senior Unsecured Term Loan Facility | Maximum                      
Derivatives                      
Stated interest rate, basis spread on variable rate     1.95%                
LIBOR | Interest rate caps                      
Derivatives                      
Interest rate agreement, notional amount                 $ 75,000,000.0   $ 50,000,000.0
Interest rate cap agreement, strike price                 1.25%   1.25%
Interest rate cap agreement, premium                 $ 100,000   $ 400,000
LIBOR | Interest rate caps | Operating Partnership                      
Derivatives                      
Interest rate agreement, notional amount           $ 70,000,000.0   $ 75,000,000.0      
Interest rate cap agreement, strike price           1.00%   1.50%      
LIBOR | Interest rate caps | Maximum | Operating Partnership                      
Derivatives                      
Interest rate cap agreement, premium           $ 100,000   $ 100,000