STOCK-BASED COMPENSATION PLANS - Summary of Activity (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Non-Vested Stock Awards Outstanding
Non-vested Stock Awards Outstanding, Number of Shares
Balance at the beginning of the period (in shares)			450,000
Granted (in shares)			306,000
Stock awards vested (in shares)	(37,000)	(3,000)	(133,000)	(130,000)
Forfeited (in shares)			(87,000)
Balance at the end of the period (in shares)	536,000		536,000
Non-vested Stock Awards Outstanding, Weighted-Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)			$ 32.47
Granted (in dollars per share)			16.84
Stock awards vested (in dollars per share)			33.84
Forfeited (in dollars per share)			30.23
Balance at the end of the period (in dollars per share)	$ 28.35		$ 28.35
Stock Options Outstanding
Stock Options Outstanding, Number of Shares
Balance at the beginning of the period (in shares)			153,000
Granted (in shares)			0
Acquired (in shares)			0
Stock options exercised (in shares)	0		(33,000)
Expired (in shares)			(1,000)
Balance at the end of the period (in shares)	119,000		119,000
Exercisable options at the end of the period (in shares)	119,000		119,000
Stock Options Outstanding, Weighted-Average Exercise Price
Balance at the beginning of the period (in dollars per share)			$ 22.00
Granted (in dollars per share)			0
Acquired (in dollars per share)			0
Stock options exercised (in dollars per share)			18.38
Expired (in dollars per share)			9.85
Balance at the end of the period (in dollars per share)	$ 22.72		22.72
Exercisable options at the end of the period (in dollars per share)	$ 22.72		$ 22.72