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Share-Based Compensation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Feb. 07, 2017
$ / shares
Feb. 10, 2016
$ / shares
Mar. 31, 2017
USD ($)
installment
plan
$ / shares
shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Mar. 31, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of share-based compensation plans | plan     2    
Number of shares authorized under plan | shares     10,400,000    
Share-based compensation cost capitalized as part of real estate assets | $     $ 129 $ 114  
Weighted Average Grant-Date Fair Value          
Unrecognized compensation cost related to nonvested stock awards | $     $ 8,755    
Compensation cost to be recognized over a weighted average period     3 years 1 month 6 days    
Vested at conclusion of performance period          
Weighted Average Grant-Date Fair Value          
Vesting percentage     60.00%    
Remaining percentage after performance period          
Weighted Average Grant-Date Fair Value          
Vesting percentage     40.00%    
Vested each year for the first two anniversaries after conclusion of performance period          
Weighted Average Grant-Date Fair Value          
Vesting percentage     20.00%    
Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense | $     $ 1,430 1,544  
Shares          
Nonvested, beginning of period (in shares) | shares     602,162    
Granted (in shares) | shares     326,424    
Vested (in shares) | shares     (228,634)    
Forfeited (in shares) | shares     (2,110)    
Nonvested, end of period (in shares) | shares     697,842    
Weighted Average Grant-Date Fair Value          
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share) | $ / shares     $ 15.41    
Weighted average grant date fair value, granted (in dollars per share) | $ / shares     10.75    
Weighted average grant date fair value, vested (in dollars per share) | $ / shares     14.83    
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares     13.96    
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares     $ 13.43    
Number of annual installment for awards to vest | installment     4    
Restricted Stock Awards | Vested on date of grant          
Weighted Average Grant-Date Fair Value          
Vesting percentage     20.00%    
Performance Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense | $     $ 344 $ 258  
Shares          
Granted (in shares) | shares     277,376 282,995 138,680
Weighted Average Grant-Date Fair Value          
Weighted average grant date fair value, granted (in dollars per share) | $ / shares     $ 6.86 $ 4.98 $ 15.52
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares $ 6.86 $ 4.98      
Unrecognized compensation cost related to nonvested stock awards | $     $ 3,564    
Performance period (in years)     3 years    
Risk-free interest rate (as a percent) 1.53% 0.92%      
Expected share price volatility (as a percent) 32.85% 30.95%      
Chief Executive Officer          
Shares          
Granted (in shares) | shares     115,082    
Weighted Average Grant-Date Fair Value          
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares $ 5.62        
Officer          
Shares          
Granted (in shares) | shares     162,294    
Weighted Average Grant-Date Fair Value          
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares $ 7.74