CAPITAL STOCK (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CAPITAL STOCK
Authorized common stock (in shares)	199,000,000	199,000,000
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)	82,800,000
Common stock repurchases (in shares)	1,600,000	2,100,000
Balance at the end of the year (in shares)	84,100,000	82,800,000
Cash dividends paid on the common stock (in dollars)	$ 58,442	$ 53,308	$ 44,485
Common Stock Par Value
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)	82,773,322	81,796,938
Restricted stock vestings (in shares)	9,023	8,709
Balance at the end of the year (in shares)	84,086,341	82,773,322
Common Stock Par Value | Stock Awards Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)	1,234,163	933,175
Common Stock Par Value | Director Stock Option Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)	69,833	34,500
Treasury Stock
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)	16,921,022	15,047,020
Common stock repurchases (in shares)	1,616,433	2,070,819
Balance at the end of the year (in shares)	18,158,002	16,921,022
Treasury Stock | Stock Awards Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)	(379,453)	(196,817)