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Share-Based Compensation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Feb. 12, 2018
$ / shares
shares
Feb. 07, 2017
$ / shares
shares
Feb. 10, 2016
$ / shares
Mar. 31, 2018
USD ($)
installment
$ / shares
shares
Mar. 31, 2017
USD ($)
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized under plan (in shares)       10,400,000    
Share-based compensation cost capitalized as part of real estate assets | $       $ 122 $ 129  
Weighted-Average Grant Date Fair Value            
Unrecognized compensation cost related to nonvested stock awards | $       $ 7,152    
Compensation cost to be recognized over a weighted average period       2 years 9 months 55 days    
Number of shares authorized to be granted annually (in shares)       200,000    
Chief Executive Officer            
Shares            
Granted (in shares) 494,676 115,082        
Weighted-Average Grant Date Fair Value            
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares $ 3.13 $ 5.62        
Officer            
Shares            
Granted (in shares) 247,301 162,294        
Weighted-Average Grant Date Fair Value            
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares $ 1.63 $ 7.74        
Vested each year for the first two anniversaries after conclusion of performance period            
Weighted-Average Grant Date Fair Value            
Vesting percentage       20.00%    
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%    
Restricted Stock Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense | $       $ 1,767 1,430  
Shares            
Nonvested, beginning of period (in shares)       642,359    
Granted (in shares)       693,064    
Vested (in shares)       (408,834)    
Forfeited (in shares)       (1,292)    
Nonvested, end of period (in shares)       925,297    
Weighted-Average Grant Date Fair Value            
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share) | $ / shares       $ 13.23    
Weighted average grant date fair value, granted (in dollars per share) | $ / shares       4.55    
Weighted average grant date fair value, vested (in dollars per share) | $ / shares       9.63    
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares       11.02    
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares       $ 8.32    
Number of annual installment for awards to vest (installment) | 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 | $       $ 419 $ 344  
Shares            
Nonvested, beginning of period (in shares)       560,371    
Granted (in shares)       741,977    
Nonvested, end of period (in shares)       1,302,348    
Weighted-Average Grant Date Fair Value            
Weighted average grant date fair value, nonvested, beginning of period (in dollars per share) | $ / shares       $ 5.91    
Weighted average grant date fair value, granted (in dollars per share) | $ / shares       2.63    
Weighted average grant date fair value, nonvested, end of period (in dollars per share) | $ / shares $ 4.76 $ 6.86 $ 4.98 $ 4.04    
Unrecognized compensation cost related to nonvested stock awards | $       $ 3,694    
Compensation cost to be recognized over a weighted average period       4 years    
Performance period       3 years   3 years
Award vesting rights, total stockholder return to the national association of real estate investment trusts retail index, percentage       66.67%    
Award vesting rights, absolute total stockholder return metrics, percentage       33.33%    
Risk-free interest rate 2.36% 1.53% 0.92%      
Expected share price volatility 42.02% 32.85% 30.95%