ACCOUNTS RECEIVABLE, NET OF ALLOWANCE - Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of period	$ 4,941
Provision for doubtful accounts	7,559	$ 7,358
Charge-offs, net	(6,600)	(9,300)
Balance, end of period	5,884	4,941
Contract Cancellations
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of period	4,941	19,795
Cumulative effect of accounting changes		(12,876)
Provision for doubtful accounts	7,559	7,358
Charge-offs, net	(6,616)	(9,336)
Balance, end of period	$ 5,884	$ 4,941