SHARE BASED COMPENSATION - Service Based Restricted Stock Activity (Details) - Restricted stock units $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	763,728
Granted (in shares) | shares	637,113
Vested (in shares) | shares	(173,117)
Forfeited/canceled (in shares) | shares	(68,414)
Ending balance (in share) | shares	1,159,310
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 19.64
Granted (in dollars per share) | $ / shares	15.51
Vested (in dollars per share) | $ / shares	21.25
Forfeited/canceled (in dollars per share) | $ / shares	18.58
Ending balance (in dollars per share) | $ / shares	$ 17.19
Unamortized stock compensation expense | $	$ 16.9
Weighted-average recognition period (in years)	2 years 7 months 6 days