Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details)

v3.8.0.1
STOCK-BASED COMPENSATION (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contractual term 10 years    
Option granted (in shares) 0 0 0
Summary of option activity, number outstanding [Roll Forward]      
Outstanding, beginning of period (in shares) 53,000    
Exercised (in shares) (8,000)    
Expired (in shares) 0    
Outstanding, end of period (in shares) 45,000 53,000  
Exercisable, end of period (in shares) 45,000    
Weighted average exercise price [Roll Forward]      
Outstanding beginning of period (in dollars per share) $ 8.57    
Exercised (in dollars per share) 8.57    
Expired (in dollars per share) 0    
Outstanding end of period (in dollars per share) 8.57 $ 8.57  
Exercisable, end of period (in dollars per share) $ 8.57    
Options, additional disclosures [Abstract]      
Outstanding, weighted average remaining contractual term 18 days    
Exercisable, weighted average remaining contractual term 18 days    
Outstanding, aggregate intrinsic value $ 64,350,000    
Exercisable, aggregate intrinsic value 64,350,000    
Information related to stock options during each year [Abstract]      
Intrinsic value of options exercised 0 $ 0 $ 0
Cash received from option exercises 68,000 0 0
Tax benefit realized from option exercises 8,000 0 0
Share-based compensation cost 0 0 0
Unrecognized cost related to nonvested stock options granted $ 0    
Stock Options [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 1 year    
Stock Options [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Information related to stock options during each year [Abstract]      
Share-based compensation cost $ 465,000 $ 536,000 478,000
Changes in nonvested restricted stock awards, shares [Roll Forward]      
Outstanding, beginning of period (in shares) 132,548    
Granted (in shares) 49,770    
Vested (in shares) (70,215)    
Forfeited (in shares) (7,055)    
Outstanding, end of period (in shares) 105,048 132,548  
Weighted-average grant-date fair value [Roll Forward]      
Outstanding, beginning of period (in dollars per share) $ 6.88    
Granted (in dollars per share) 9.87    
Vested (in dollars per share) 6.26    
Forfeited (in dollars per share) 6.60    
Outstanding, end of period (in dollars per share) $ 8.73 $ 6.88  
Aggregate intrinsic value [Roll Forward]      
Outstanding, beginning of period $ 1,325,480    
Granted 497,700    
Vested 702,150    
Forfeited 70,550    
Outstanding, end of period 1,050,480 $ 1,325,480  
Total remaining unrecognized compensation cost related to nonvested shares $ 844,000    
Weighted-average period for recognition for unrecognized compensation cost 1 year 5 months 19 days    
Total grant date fair value of shares vested $ 440,000 $ 588,000 $ 471,000
Employees' Plans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares permitted under the plan (in shares) 1,917,210    
Directors' Plans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares permitted under the plan (in shares) 473,278    
2015 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares permitted under the plan (in shares) 1,500,000    
Shares available for issuance (in shares) 1,322,092