STOCK REPURCHASE PROGRAM (NARRATIVE) (DETAILS) - USD ($) $ in Thousands, shares in Millions	12 Months Ended			194 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
STOCK REPURCHASE PROGRAM [ABSTRACT]
Cumulative Authorized Share Repurchase Allowance	$ 762,300			$ 762,300
Treasury Stock Purchases, Shares				46.1
Cost of Treasury Stock Purchases	18,328	$ 74,683	$ 17,231	$ 735,800
Remaining Allowance Stock Repurchase Program	26,600			$ 26,600
Purchases of common stock, share				46.1
Purchases of common stock, value	$ 18,328	$ 74,683	$ 17,231	$ 735,800