EQUITY (Changes in Total Equity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
EQUITY [Abstract]
Balance at beginning of year			$ 4,572,476	$ 4,454,188	$ 4,454,188
Net earnings	$ 120,139	$ 124,709	165,060	164,866
Share-based compensation, net of shares withheld for taxes			(24,108)	(28,696)
Purchase and retirement of common stock			(60,303)	(69,156)	(161,463)
Share-based compensation expense			13,671	10,832
Cash dividends on common stock ($0.50/$0.40 per share)			(66,194)	(53,338)
Other comprehensive income	755	321	1,502	635
Balance at end of year	$ 4,602,104	$ 4,479,331	$ 4,602,104	$ 4,479,331	$ 4,572,476
Cash dividend on common stock, per share	$ 0.25	$ 0.20	$ 0.50	$ 0.40