STOCK-BASED COMPENSATION (Restricted Stock Awards) (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of restricted stock [Roll Forward]
Unvested at beginning of period (in shares)	1,399,181	1,607,000	1,080,000
Granted (in shares)	415,000	535,000	1,132,000
Forfeited (in shares)	(26,000)	(37,000)	(82,000)
Vested (in shares)	(618,000)	(706,000)	(523,000)
Unvested at end of period (in shares)	1,169,582	1,399,181	1,607,000
Summary of restricted stock awards, additional disclosures [Abstract]
Unvested at beginning of period (in dollars per share)	$ 38.13	$ 31.79	$ 21.67
Granted (in dollars per share)	57.58	44.54	35.97
Forfeited (in dollars per share)	38.45	30.38	22.96
Vested (in dollars per share)	36.54	28.35	21.89
Unvested at end of period (in dollars per share)	$ 45.80	$ 38.13	$ 31.79