Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS (Details)

v3.19.1
SUBSEQUENT EVENTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 15, 2019
Feb. 01, 2019
Jan. 27, 2019
Nov. 23, 2018
Aug. 24, 2018
May 25, 2018
Mar. 09, 2018
Feb. 01, 2018
Nov. 24, 2017
Aug. 31, 2017
May 19, 2017
Mar. 03, 2017
Jan. 24, 2017
Dec. 31, 2018
Dec. 31, 2017
Subsequent Event [Line Items]                              
Cash dividends declared per common stock outstanding (in dollars per share)                           $ 2.77 $ 1.52
Cash dividends paid per common stock outstanding (in dollars per share)       $ 0.16 $ 0.15 $ 0.14 $ 0.13   $ 0.12 $ 0.11 $ 0.10 $ 0.09   $ 2.77 $ 1.52
Special cash dividend paid per common stock outstanding (in dollars per share)       $ 0.18 $ 0.25 $ 1.76     $ 0.15 $ 0.25 $ 0.35 $ 0.35      
2016 Plan | Restricted Stock                              
Subsequent Event [Line Items]                              
Number of shares granted (in shares)               34,202         56,260 34,202 56,260
Shares vesting period               3 years         3 years    
Value of shares granted               $ 554         $ 1,400    
Subsequent Event                              
Subsequent Event [Line Items]                              
Cash dividends declared per common stock outstanding (in dollars per share)     $ 0.16                        
Special cash dividend declared per common stock outstanding (in dollars per share)     $ 0.08                        
Cash dividends paid per common stock outstanding (in dollars per share) $ 0.16                            
Special cash dividend paid per common stock outstanding (in dollars per share) $ 0.08                            
Subsequent Event | 2016 Plan | Restricted Stock                              
Subsequent Event [Line Items]                              
Number of shares granted (in shares)   22,603                          
Shares vesting period   3 years                          
Value of shares granted   $ 377