STOCK-BASED COMPENSATION PLANS - Changes in Unvested Restricted Stock (Details) - RSAs	12 Months Ended
	Dec. 31, 2020 $ / shares shares
RSAs
Unvested shares at the beginning of the period (in shares) | shares	136,543
Granted (in shares) | shares	831,228
Vested (in shares) | shares	(520,655)
Forfeited (in shares) | shares	(5,407)
Unvested shares at the end of the period (in shares) | shares	441,709
Weighted-Average Price
Unvested shares at the beginning of the period (in dollars per share) | $ / shares	$ 32.80
Granted (in dollars per share) | $ / shares	28.21
Vested (in dollars per share) | $ / shares	28.81
Forfeited (in dollars per shares) | $ / shares	28.89
Unvested shares at the end of the period (in dollars per share) | $ / shares	$ 28.86