GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill consist of the following activity for the years ended December 31, 2020, 2019 and 2018 (in thousands):

Balance at December 31, 2017	$	627,392
Acquisitions	5,077
Balance at December 31, 2018	$	632,469
Acquisitions	793,073
Balance at December 31, 2019	$	1,425,542
Purchase accounting adjustments	3,068
Balance at December 31, 2020	$	1,428,610

Schedule of Carrying Amount and Accumulated Amortization of Intangible Assets

The carrying amount and accumulated amortization of intangible assets consists of the following as of December 31, 2020 and 2019 (in thousands):

	December 31, 2020		December 31, 2019
Gross intangible assets:
Referral sources	$	438,121	$	438,121
Trademarks/names	44,536		44,536
Other amortizable intangible assets	402		402
Total gross intangible assets	483,059		483,059
Accumulated amortization:
Referral sources	(110,498)		(84,295)
Trademarks/names	(21,146)		(12,748)
Other amortizable intangible assets	(363)		(106)
Total accumulated amortization	(132,007)		(97,149)
Total intangible assets, net	$	351,052	$	385,910

Schedule of Future Amortization Expense for Intangible Assets

Expected future amortization expense for intangible assets recorded at December 31, 2020, is as follows (in thousands):

2021	$	32,015
2022	28,338
2023	28,338
2024	28,338
2025	28,338
2026 and beyond	205,685
Total	$	351,052