SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Antidilutive Options (Details) - Stock options - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Options not included in the computation of diluted earnings per share:
Options to purchase shares of common stock (in shares)	843,980	697,968	203,667
Minimum
Options not included in the computation of diluted earnings per share:
Exercise prices (in dollars per share)	$ 44.55	$ 39.82	$ 45.32
Maximum
Options not included in the computation of diluted earnings per share:
Exercise prices (in dollars per share)	$ 59.07	$ 47.81	$ 46.73