STOCKHOLDERS' EQUITY - Narrative (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2017
Class of Stock [Line Items]
Other treasury share purchases	$ 6,700,000
Common Stock
Class of Stock [Line Items]
Repurchases of common stock (in shares)	0.2
Second Share Repurchase Program | Common Stock
Class of Stock [Line Items]
Authorized repurchase amount		$ 50,000,000.0
Repurchases of common stock (in shares)	0.2
Other treasury share purchases	$ 6,700,000