Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY NARRATIVE (Details)

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STOCKHOLDERS' EQUITY NARRATIVE (Details) - USD ($)
3 Months Ended 9 Months Ended
Jul. 31, 2017
Apr. 24, 2017
Jan. 24, 2017
Apr. 08, 2016
Sep. 30, 2017
Sep. 30, 2016
Mar. 31, 2016
Sep. 30, 2017
Sep. 30, 2016
Apr. 07, 2016
Jan. 12, 2016
Jul. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Common Stock, Dividends, Per Share, Declared $ 0.11 $ 0.10 $ 0.09   $ 0.36 $ 0.07   $ 1.25 $ 0.18      
CommonStockSpecialDividendsPerShareDeclared $ 0.25 $ 0.35 $ 0.35                  
Dividends, Common Stock, Cash $ 2,833,000 $ 3,964,000 $ 3,962,000                  
Dividends, Cash $ 1,246,000 $ 1,133,000 $ 1,019,000         $ 14,157,000        
Share-based compensation expense         $ 8,600 $ 10,000   25,900 $ 94,000      
Additional stock-based compensation expense             $ 64,000          
Stock repurchase program, amount authorized                     $ 70,000,000.0 $ 15,000,000.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount         32,000,000.0     $ 32,000,000.0        
Common Stock, Dividends, Per Share, Cash Paid               $ 1.25        
Restricted Stock                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Granted (in shares)       56,260       0        
Award vesting period (in years)       3 years                
Share-based compensation expense not yet recognized         $ 8,400     $ 8,400        
Recognition period for compensation costs not yet recognized (in years)               2 months 12 days        
Equity Incentive Plan 2016 | Common Stock                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Shares authorized                   2,500,000    
Equity Incentive Plan 2016 | Restricted Stock                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Granted (in shares)               56,260