STOCKHOLDERS' EQUITY - Repurchase of Common Stock (Details) - $ / shares	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
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)	2,464,272
Number of shares remaining in treasury (in shares)	109,919		203,879
Number of shares acquired under stock repurchase plan and subsequently reissued (in shares)	32,505	8,496
Treasury stock acquired, average cost (in dollars per share)	$ 93.05	$ 85.53