ACQUISITION, INTEGRATION AND RESTRUCTURING - Restructuring Reserve (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 406,000
Additions	798,000	$ 0
Payments	(1,204,000)
Restructuring reserve, ending balance	0
North America Interactive
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	142,000
Additions	197,000
Payments	(339,000)
Restructuring reserve, ending balance	0
International Interactive
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	264,000
Additions	601,000
Payments	(865,000)
Restructuring reserve, ending balance	$ 0