FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2019

FAIR VALUE MEASUREMENTS

Schedule of implied fair value of the Company’s First Lien Term Loan (as defined below)

	December 31, 2018				December 31, 2019
	Stated		Fair		Stated		Fair
	Value		Value		Value		Value
First Lien Term Loan	$	798,985	$	773,018	$	1,139,188	$	1,146,307

Schedule of changes in the fair value of estimated contingent consideration for business acquisitions

	2018		2019
Balance at January 1,	$	76,677	$	98,905
Additions to estimated contingent consideration		42,086		82,781
Payments of contingent consideration		(26,237)		(36,862)
Non-cash changes in fair value of estimated contingent consideration		6,638		38,797
Other		(259)		(53)
Balance at December 31,	$	98,905	$	183,568

Schedule of inputs used in the fair value measurement of estimated contingent consideration

		Quantitative Information About Level 3
		Fair Value Measurements
Fair Value at		Valuation	Unobservable
December 31, 2018		Techniques	Inputs	Ranges
$	98,905	Monte Carlo Simulation Model	Forecasted growth rates	(16.2)% - 18.7	%
			Discount rates	12% - 18	%

		Quantitative Information About Level 3
		Fair Value Measurements
Fair Value at		Valuation	Unobservable
December 31, 2019		Techniques	Inputs	Ranges
$	183,568	Monte Carlo Simulation Model	Forecasted growth rates	(10.7)% - 51.1	%
			Discount rates	11% - 17	%