GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021, 2020 and 2019 (in thousands):

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
Acquisitions	48,954
Balance at December 31, 2021	$	1,477,564

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, 2021 and 2020 (in thousands):

	December 31, 2021		December 31, 2020
Gross intangible assets:
Referral sources	$	482,200	$	438,121
Trademarks/names	47,718		44,536
Other amortizable intangible assets	1,037		402
Total gross intangible assets	530,955		483,059
Accumulated amortization:
Referral sources	(137,613)		(110,498)
Trademarks/names	(26,936)		(21,146)
Other amortizable intangible assets	(386)		(363)
Total accumulated amortization	(164,935)		(132,007)
Total intangible assets, net	$	366,020	$	351,052

Schedule of Future Amortization Expense for Intangible Assets

Expected future amortization expense for intangible assets recorded at December 31, 2021, is as follows (in thousands):

2022	$	31,628
2023	31,628
2024	31,628
2025	31,628
2026	31,628
2027 and beyond	207,880
Total	$	366,020