Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Details Narrative)

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STOCKHOLDERS' EQUITY (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Cash dividend paid $ 34,332 $ 30,602  
Cash dividend per share (in dollars per share) $ 0.105 $ 0.093  
Shares repurchased $ 9,100 $ 9,200  
Restricted Stock Units (RSUs) [Member]      
Unrecognized compensation cost $ 53,500   $ 39,200
Unrecognized compensation cost, period for recognition 4 years 9 months 18 days   4 years 1 month 6 days