REVENUE RECOGNITION - Contract Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Deferred Revenue	$ 45,217	$ 35,547
Deferred Revenue, Noncurrent	929	1,035
Contract with Customer, Liability, Revenue Recognized	35,692	42,309	$ 45,511
Accounts receivable, net of allowance for doubtful accounts of $733 and $1,001	$ 18,385	$ 16,134