STOCKHOLDERS' EQUITY - Repurchase of Common Stock (Details) - $ / shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 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)	2,654,520
Number of shares remaining in treasury (in shares)	66,055		76,084
Number of shares acquired under stock repurchase plan and subsequently reissued (in shares)	86,124	32,505
Treasury stock acquired, average cost (in dollars per share)	$ 125.81	$ 93.05