STOCKHOLDERS' EQUITY (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividend paid	$ 17,483	$ 15,301
Cash dividend per share (in dollars per share)	$ 0.08	$ 0.07
Number of shares repurchased (in shares)	19,000	50,000
Par value of common stock (in dollars per share)	$ 1		$ 1
Weighted average stock price of shares repurchased (in dollars per share)	$ 22.42	$ 18.15
Repurchase of common stock from employees	6,100	5,700
Common stock reserved for issuance upon exercise of stock options (in shares)	5,000,000
Tax benefits from share-based payments	2,300	3,400	4,700
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 41,300	$ 29,400
Unrecognized compensation cost, period for recognition	4 years 3 months 18 days		3 years 8 months 12 days