DIVIDENDS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Mar. 30, 2012
DIVIDENDS PER SHARE [Abstract]
Date declared	2012-07	2012-05		2012-07		2012-01
Cash dividend declared (in dollars per share)	$ 0.2	$ 0.2	$ 0.2
Payment of cash dividends	$ 11,900	$ 12,300	$ 12,500	$ 36,626	$ 26,671
Date paid	Sep. 12, 2012	Jun. 13, 2012	Mar. 14, 2012
Date of record	Feb. 24, 2012