ACQUISITION, INTEGRATION AND RESTRUCTURING EXPENSE - Restructuring Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Restructuring liability as of December 31, 2018	$ 0
Additions	1,268	$ 0
Payments	(1,245)
Restructuring liability as of December 31, 2019	23	0
Delaware Restructuring
Restructuring Reserve [Roll Forward]
Restructuring liability as of December 31, 2018	0
Additions	843
Payments	(820)
Restructuring liability as of December 31, 2019	23	0
Rhode Island Restructuring
Restructuring Reserve [Roll Forward]
Restructuring liability as of December 31, 2018	0
Additions	425
Payments	(425)
Restructuring liability as of December 31, 2019	$ 0	$ 0