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Share-Based Compensation (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 29, 2016
$ / shares
shares
Mar. 31, 2015
$ / shares
shares
Jun. 30, 2016
USD ($)
plan
$ / shares
shares
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
installment
plan
$ / shares
shares
Jun. 30, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of share-based compensation plans | plan     2   2  
Number of shares authorized under plan     10,400,000   10,400,000  
Share-based compensation cost capitalized as part of real estate assets | $     $ 77 $ 74 $ 191 $ 153
Weighted Average Grant-Date Fair Value            
Unrecognized compensation cost related to nonvested stock awards | $     8,603   $ 8,603  
Compensation cost to be recognized over a weighted average period         3 years 1 month 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 | $     $ 707 679 $ 1,948 2,923
Shares            
Nonvested, beginning of period (in shares)         533,404  
Granted (in shares)         319,660  
Vested (in shares)         (200,889)  
Forfeited (in shares)         (9,560)  
Nonvested, end of period (in shares)     642,615   642,615  
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         16.46  
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares         17.04  
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares     $ 15.52   $ 15.52  
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 $ 516 $ 312
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 | $     $ 2,421   $ 2,421  
Performance period (in years)         3 years