SHAREHOLDERS' EQUITY (DETAILS 2) (Common Stock [Member], USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Treasury Shares [Line Items]
Total shares	3,058,000	5,122,000	7,094,000	8,491,000
Total cost	$ 139,380	$ 228,256	$ 318,082	$ 359,025
Average price per share	$ 45.59	$ 44.57	$ 44.84	$ 42.28
Trident [Member]
Treasury Shares [Line Items]
Total shares		3,000,000
In the Open Market [Member]
Treasury Shares [Line Items]
Total shares	2,970,000	5,048,000	6,680,000	5,048,000
Total cost	135,395	225,000	300,000	225,000
Average price per share	$ 45.59	$ 44.57	$ 44.91	$ 44.57
From Employees [Member]
Treasury Shares [Line Items]
Total shares	88,000	74,000	414,000	443,000
Total cost	3,985	3,256	18,082	17,925
Average price per share	$ 45.57	$ 44.10	$ 43.66	$ 40.47
From Founding Shareholder [Member]
Treasury Shares [Line Items]
Total shares	0	0	0	3,000,000
Total cost	$ 0	$ 0	$ 0	$ 116,100
Average price per share	$ 0.00	$ 0.00	$ 0.00	$ 38.70