Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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STOCK-BASED COMPENSATION - Adoption of ASU No. 2016-09 (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2017
Prospective adoption
Provision for income taxes	$ (8,551)	$ (14,161)	$ (13,358)
ASU 2016-09
Prospective adoption
Provision for income taxes	$ 700
Increase of basic and diluted earnings per share	$ 0.05	$ 0.08
Cumulative effect adjustment to retained earnings				$ 0