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Share-Based Compensation (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Feb. 29, 2016
$ / shares
shares
Mar. 31, 2015
$ / shares
shares
Mar. 31, 2016
USD ($)
installment
plan
$ / shares
shares
Mar. 31, 2015
USD ($)
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     10,400,000  
Share-based compensation cost capitalized as part of real estate assets | $     $ 114 $ 79
Weighted Average Grant-Date Fair Value        
Unrecognized compensation cost related to nonvested stock awards | $     $ 9,501  
Compensation cost to be recognized over a weighted average period     3 years 3 months 20 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 | $     $ 1,544 2,244
Shares        
Nonvested, beginning of period (in shares)     533,404  
Granted (in shares)     319,660  
Vested (in shares)     (199,069)  
Forfeited (in shares)     (4,460)  
Nonvested, end of period (in shares)     649,535  
Weighted Average Grant-Date Fair Value        
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share) | $ / shares     $ 19.19  
Weighted average grant date fair value, granted (in dollars per share) | $ / shares     10.02  
Weighted average grant date fair value, vested (in dollars per share) | $ / shares     16.43  
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares     17.62  
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares     $ 15.54  
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 | $     $ 258 $ 156
Shares        
Granted (in shares) 282,995 138,680    
Weighted Average Grant-Date Fair Value        
Weighted average grant date fair value, granted (in dollars per share) | $ / shares $ 4.98 $ 15.52    
Unrecognized compensation cost related to nonvested stock awards | $     $ 2,679  
Performance period (in years)     3 years