STOCKHOLDERS' EQUITY - Repurchase of Common Stock (Details) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Number of shares authorized to be repurchased (in shares)	3,763,038
Aggregate number of shares repurchased since inception (in shares)	2,581,871
Number of shares remaining in treasury (in shares)	19,089		76,084
Number of shares acquired under stock repurchase plan and subsequently reissued (in shares)	13,475	8,224
Treasury stock acquired, average cost (in dollars per share)	$ 118.41	$ 108.40