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COMPENSATION PROGRAMS - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2017
Jul. 31, 2016
Feb. 29, 2016
Jan. 31, 2016
Jan. 31, 2015
Dec. 31, 2013
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Targeted award opportunity on base salary                   125.00%          
Short-term incentive compensation program accruals             $ 818,000     $ 818,000          
Annual incentive compensation expense             1,833,000   $ 2,042,000 2,948,000 $ 5,266,000        
Adjustment of short-term incentive compensation program accruals               $ 938,000              
Dividend equivalent rights payable             20,611,000     $ 20,611,000         $ 22,634,000
Total original grants (in shares)                   123,862          
Grant date fair value per share (in dollars per share)                   $ 10.41          
Forfeitures (in shares)                   (24,881)          
Defined Contribution Plan Disclosure [Abstract]                              
Defined contribution plan, voluntary contribution based on compensation                   50.00%          
Defined contribution plan, employer matching contribution                   3.00%          
Defined contribution plan, cost recognized             $ 57,000     $ 88,000          
Maximum [Member]                              
Defined Contribution Plan Disclosure [Abstract]                              
Defined contribution plan, annual contributions per employee                   6.00%          
Long-Term Equity-Based Awards [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Common shares available for future issuances (in shares)             3,726,459     3,726,459          
Annual Incentive Compensation [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Annual incentive compensation expense             $ 321,000     $ 818,000          
Dividend Equivalent Rights Program [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Annual incentive compensation expense             110,000     220,000          
Dividend Equivalent Rights Program [Member] | Accounts Payable and Accrued Liabilities [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Dividend equivalent rights payable             110,000     110,000          
Performance-based RSUs [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Dividend equivalent rights payable             373,000     $ 373,000          
Share awards performance period                   3 years          
Total original grants (in shares) 148,894   269,354   247,512 242,505                  
Grant date fair value per share (in dollars per share) $ 10.52   $ 8.03   $ 8.83 $ 12.45                  
Long term incentive compensation expense             311,000     $ 623,000          
Performance-based RSUs [Member] | December 2016 [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Forfeitures (in shares)                   (99,257)          
Performance-based RSUs [Member] | December 2015 [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Forfeitures (in shares)                   (93,058)   (37,199)      
Performance-based RSUs [Member] | December 2013 [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Forfeitures (in shares)                       (36,467)      
Stock Awards Activity [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Long term incentive compensation expense             220,000     $ 440,000          
Other general and administrative expense             105,000     210,000          
Total of unrecognized compensation expense for unvested stock award             1,700,000     $ 1,700,000          
Compensation cost not yet recognized, period for recognition                   1 year 6 months          
Stock Awards Activity [Member] | January 2017 [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total original grants (in shares)                   62,137          
Grant date fair value per share (in dollars per share)                   $ 11.67          
Service-Based Stock Awards [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total original grants (in shares)   41,881                          
Grant date fair value per share (in dollars per share)   $ 10.03                          
Forfeitures (in shares)   (24,881)                          
Service-based stock awards issuance period                   1 year          
Service-Based Stock Awards [Member] | Management [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Dividend equivalent rights payable             $ 89,000     $ 89,000          
Total original grants (in shares) 74,446   67,337                        
Grant date fair value per share (in dollars per share) $ 10.41   $ 9.32                        
Share-based compensation arrangement by share-based payment award vesting period 2020-01   2019-02                        
Service-Based Stock Awards [Member] | Employee [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total original grants (in shares) 49,416     61,272                 37,237 35,703  
Grant date fair value per share (in dollars per share) $ 10.41     $ 7.87                 $ 12.47    
Share-based compensation arrangement by share-based payment award vesting period 2020-01     2019-01                 2018-01    
Share-based compensation arrangement by share-based payment award vesting date                           Jan. 03, 2017  
Stock Option [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Exercisable option awards outstanding (in shares)             30,000     30,000          
Weighted average strike price (in dollars per share)             $ 12.28     $ 12.28          
Aggregate intrinsic value             $ 0     $ 0          
Exercisable, weighted average remaining contractual term                   1 year 3 months 18 days          
Exercisable, intrinsic value             $ 0     $ 0          
Share awards contractual term                   10 years