CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 31, 2019

CASH FLOW INFORMATION

Schedule of supplemental cash flow information

	Three Months Ended
	March 31,
	2018		2019
Supplemental disclosures of cash flow information—cash paid for:
Interest	$	14,432	$	11,462
Income taxes	$	839	$	1,548
Supplemental non-cash cash flow information:
Fair market value of estimated contingent consideration in connection with acquisitions	$	8,928	$	29,583
Fair market value of restricted common units in connection with acquisitions and contingent consideration	$	6,584	$	—
Net tangible assets acquired in connection with business acquisitions	$	193	$	1,502
Deferred taxes and tax receivable agreements	$	—	$	858
Right of use asset related to operating leases	$	—	$	171,189
Lease liability related to operating leases	$	—	$	181,597