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Equity - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 18 Months Ended
Jul. 09, 2019
Jan. 31, 2019
Jun. 30, 2016
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Dec. 31, 2018
Jan. 31, 2018
Sep. 05, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Shares repurchased (in shares)       3,590,000              
Repurchases of common stock           $ 46,000 $ 0        
Effect of diluted securities (in shares)       0 0 0 200,000        
Subsequent Event                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Dividends declared per share (in dollars per share) $ 0.20                    
New Share Repurchase Program                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Beneficial interest purchased authorized amount                     $ 5,000,000
Shares repurchased (in shares)       3,590 0 3,590 0        
Average market price of shares repurchased (in dollars per share)       $ 12.80   $ 12.80          
Repurchases of common stock       $ 46,000   $ 46,000          
Remaining under repurchase plan       4,793,000   4,793,000   $ 4,793,000      
Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Compensation expense       36,000 $ 73,000 71,000 $ 146,000        
Deferred unearned compensation       248,000   248,000   248,000 $ 319,000    
Restricted Stock                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Compensation expense       337,000 $ 287,000 667,000 $ 511,000        
Deferred unearned compensation       $ 4,011,000   $ 4,011,000   $ 4,011,000 $ 2,735,000    
Remaining weighted average vesting period           2 years 7 months 6 days          
Incentive Plan 2018                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares authorized (in shares)       600,000   600,000   600,000      
Incentive Plan 2018 | Restricted Stock                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Issued (in shares)   156,399                  
Shares outstanding (in shares)       725,296   725,296   725,296      
Incentive Plan 2016 | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Issued (in shares)     450,000                
Vesting period for shares issued           5 years          
Incentive Plan 2016 | Restricted Stock                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting period for shares issued   5 years                  
Prior Plan | Restricted Stock                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of additional awards available for grant (in shares)       0   0   0      
At-the-market                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Common stock issued in offering                   $ 30,000,000  
Shares sold in offering (in shares)       0       1,590,935      
Aggregate sales price               $ 20,913,000      
Payments for commissions               424,000      
Payments of offering related expenses               $ 78,000