SHAREHOLDERS' EQUITY (DETAILS 3) (Common Stock [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Treasury Shares [Line Items]
Total shares	2,652	8	4,124	407
Total cost	$ 90,259	$ 283	$ 137,970	$ 14,840
Average price per share	$ 34.03	$ 34.25	$ 33.45	$ 36.39
Open Market [Member]
Treasury Shares [Line Items]
Total shares	2,643	0	3,840	0
Total cost	89,967	0	128,723	0
Average price per share	$ 34.04	$ 0.00	$ 33.52	$ 0.00
From Employees [Member]
Treasury Shares [Line Items]
Total shares	9	8	284	407
Total cost	$ 292	$ 283	$ 9,247	$ 14,810
Average price per share	$ 33.23	$ 34.25	$ 32.54	$ 36.39