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COMMON STOCK AND EARNINGS PER SHARE - Anti-dilutive Securities and Convertible Notes (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 15, 2020	Feb. 04, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	0	41,558	7,500
Additional diluted outstanding shares related to Convertible Notes			0
4.50% Convertible Senior Notes due 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate (as a percent)	4.50%		4.50%		4.50%
Conversion price per share (in dollars per share)					$ 68.90
3.875% Convertible Senior Notes due 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate (as a percent)	3.875%		3.875%			3.875%
Conversion price per share (in dollars per share)	$ 77.29		$ 77.29