CERTAIN RELATIONSHIPS AND RELATED-PARTY TRANSACTIONS (Tables)

12 Months Ended

Dec. 31, 2019

Related Party Transactions [Abstract]

Expenses Incurred and Revenue Earned from Related Parties

The following table provides details of the total revenue earned and expenses incurred from all related-party transactions:

	Year Ended December 31,
	2019		2018		2017
	(in thousands)
Related-party revenue	$	131,909	$	157,834	$	125,802
Related-party expenses	$	1,711	$	4,300	$	4,430
Related-party acquisition related	$	3,000	$	—	$	—