ACCOUNTS RECEIVABLE, NET OF ALLOWANCE - Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of period	$ 5,884
Provision for doubtful accounts	3,807	$ 4,219
Balance, end of period	6,998		$ 5,884
Contract Cancellations
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of period	5,884	$ 4,941	4,941
Provision for doubtful accounts	3,807		7,559
Charge-offs, net	(2,693)		(6,616)
Balance, end of period	$ 6,998		$ 5,884