CAPITAL STOCK (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2015	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Common stock and treasury stock and the share activity
Authorized common stock (in shares)			199,000,000
Balance at the beginning of the year (in shares)			66,700,000
Common stock repurchased and retired	(190,000)		(1,700,000)
Stock retirements		(20,000,000)
Balance at the end of the year (in shares)			66,000,000	66,700,000
Cash dividends paid on the common stock			$ 76,659	$ 71,247	$ 71,072
Common Stock Par Value
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)			66,685,378	86,267,467
Restricted stock vestings (in shares)			30,228	13,331
Common stock repurchased and retired			(1,726,678)	(190,350)
Stock retirements				(20,718,866)
Balance at the end of the year (in shares)			66,012,843	66,685,378	86,267,467
Common Stock Par Value | Stock Awards Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)			1,001,748	1,248,629
Common Stock Par Value | Director Stock Option Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)			22,167	65,167
Treasury Stock
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)			4,168,489	24,336,367
Common stock repurchases (in shares)			0	718,866
Stock retirements				(20,718,866)
Balance at the end of the year (in shares)			3,865,863	4,168,489	24,336,367
Treasury Stock | Stock Awards Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)			(302,626)	(167,878)