EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator (basic and diluted):
Net income	$ 558,652	$ 527,252	$ 1,645,712	$ 1,359,357
Denominator:
Denominator for basic earnings per share - weighted-average shares	68,608	73,916	69,529	74,377
Effect of stock options	632	670	645	649
Denominator for diluted earnings per share - weighted-average shares and assumed conversion	69,240	74,586	70,174	75,026
Earnings per share - basic	$ 8.14	$ 7.13	$ 23.67	$ 18.28
Earnings per share - assuming dilution	$ 8.07	$ 7.07	$ 23.45	$ 18.12
Antidilutive stock options	133	153	48	327
Weighted-average exercise price per share of antidilutive stock options	$ 467.03	$ 409.07	$ 502.49	$ 384.43