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COMMON STOCK AND EARNINGS PER SHARE - Anti-dilutive Securities and Convertible Notes (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 15, 2020	Feb. 04, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	0	39,402	7,500
Additional diluted outstanding shares related to Convertible Notes			0	0
4.50% Convertible Senior Notes due 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stated interest rate (as a percent)					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]
Stated interest rate (as a percent)	3.875%		3.875%			3.875%
Conversion price per share (in dollars per share)	$ 77.79		$ 77.79