STOCK-BASED AWARDS - Restricted Stock and Performance-Based Stock Units (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Restricted Stock Units (RSUs)
Number of Shares
Number of shares, unvested Shares at beginning of period (in shares) | shares	3,756
Number of shares, granted (in shares) | shares	1,943
Number of shares, forfeited (in shares) | shares	(131)
Number of shares, vested (in shares) | shares	(1,078)
Number of shares, unvested Shares at period end (in share) | shares	4,490
Weighted- Average Grant Date Fair Value
Weighted average grant date fair value, unvested shares at beginning of period (in usd per share) | $ / shares	$ 47.76
Weighted average grant date fair value, granted (in usd per share) | $ / shares	34.29
Weighted average grant date fair value, forfeited (in usd per share) | $ / shares	50.02
Weighted average grant date fair value, vested (in usd per share) | $ / shares	43.80
Weighted average grant date fair value, unvested shares at period end (in usd per share) | $ / shares	$ 42.81
Performance Shares
Number of Shares
Number of shares, unvested Shares at beginning of period (in shares) | shares	1,752
Number of shares, granted (in shares) | shares	720
Number of shares, unvested Shares at period end (in share) | shares	2,472
Weighted- Average Grant Date Fair Value
Weighted average grant date fair value, unvested shares at beginning of period (in usd per share) | $ / shares	$ 44.21
Weighted average grant date fair value, granted (in usd per share) | $ / shares	36.06
Weighted average grant date fair value, unvested shares at period end (in usd per share) | $ / shares	$ 41.83