STOCKHOLDERS' EQUITY (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividend paid			$ 65,506	$ 52,436
Cash dividend per share (in dollars per share)	$ .10	$ 0.08	$ .30	$ 0.24
Number of shares repurchased (in shares)	400,000		800,000	19,000
Par value of common stock (in dollars per share)	$ 1		$ 1		$ 1
Weighted average stock price of shares repurchased (in dollars per share)	$ 27.77		$ 27.19	$ 22.42
Repurchase of common stock from employees		$ 900	$ 8,300	$ 7,000
Common stock reserved for issuance upon exercise of stock options (in shares)	4,600		4,600
Tax benefits from share-based payments	$ 400	$ 100	$ 3,500	$ 1,800	$ 1,900
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 33,700		$ 33,700		$ 31,300
Unrecognized compensation cost, period for recognition			3 years 10 months 24 days		3 years 9 months 18 days