Variable Interest Entities (VIEs) - Eliminated Upon Consolidation Included In Accompanying Consolidated Balance Sheets (Details) $ in Thousands				12 Months Ended
		May 01, 2023 physician	Feb. 23, 2023	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Current assets
Cash and cash equivalents				$ 293,807	$ 288,027	$ 233,097
Investment in marketable securities				2,498	5,567
Income taxes receivable				10,657	0
Other receivables				1,335	1,834
Prepaid expenses and other current assets				17,450	14,798
Total current assets				461,507	428,125
Non-current assets
Intangible assets, net				71,648	76,861
Goodwill				278,831	269,053	246,416
Income taxes receivable				15,943	15,943
Investments in other entities – equity method				25,774	40,299	41,715
Operating lease right-of-use assets				37,396	20,444
Other assets				1,877	4,556
Total non-current assets				471,854	538,088
Total assets	[1]			933,361	966,213
Current liabilities
Accounts payable and accrued expenses				59,949	49,562
Fiduciary accounts payable				7,737	8,065
Medical liabilities				106,657	81,255	$ 55,783
Dividend payable				638	664
Finance lease liabilities				646	594
Operating lease liabilities				4,607	3,572
Current portion of long-term debt				19,500	619
Total current liabilities				218,674	148,610
Non-current liabilities
Deferred tax liability				4,072	14,217
Finance lease liabilities, net of current portion				1,033	1,275
Operating lease liabilities, net of current portion				36,289	19,915
Long-term debt, net of current portion				258,939	203,389
Other long-term liabilities				3,586	20,260
Total non-current liabilities				303,919	259,056
Total liabilities	[1]			$ 522,593	407,666
Voting rights held (more than)				50.00%
Nonrelated Party
Current assets
Receivables, net				$ 76,780	49,631
Loans receivable, net				0	996
Related Party
Current assets
Receivables, net				58,980	65,147
Loans receivable, net				0	2,125
Variable Interest Entity, Primary Beneficiary
Current assets
Cash and cash equivalents				184,078	113,080
Investment in marketable securities				0	4,543
Income taxes receivable				1,600	8,702
Other receivables				454	1,283
Prepaid expenses and other current assets				9,991	9,938
Amounts due from affiliates				0	11,609
Total current assets				275,950	228,778
Non-current assets
Land, property and equipment, net				5,306	106,626
Intangible assets, net				60,906	62,951
Goodwill				140,157	133,448
Income taxes receivable				15,943	15,943
Investments in other entities – equity method				12,114	27,561
Investment in a privately held entity				405	405
Investment in affiliates				273,182	304,755
Restricted cash				40	0
Operating lease right-of-use assets				28,796	11,408
Other assets				1,149	4,320
Total non-current assets				537,998	667,417
Total assets				813,948	896,195
Current liabilities
Accounts payable and accrued expenses				32,707	27,360
Fiduciary accounts payable				7,737	8,065
Medical liabilities				55,157	55,052
Dividend payable				638	638
Finance lease liabilities				646	594
Operating lease liabilities				3,305	2,198
Current portion of long-term debt				8,542	619
Amount due to affiliate				107,340	0
Total current liabilities				216,072	94,526
Non-current liabilities
Deferred tax liability				7,284	6,540
Finance lease liabilities, net of current portion				1,033	1,275
Operating lease liabilities, net of current portion				28,675	12,035
Long-term debt, net of current portion				0	26,645
Other long-term liabilities				230	8,542
Total non-current liabilities				37,222	55,037
Total liabilities				$ 253,294	149,563
Voting rights held (more than)		25.00%	100.00%	75.00%
Number of physicians | physician		2
Variable Interest Entity, Primary Beneficiary | Nonrelated Party
Current assets
Receivables, net				$ 21,120	14,562
Loans receivable, net				0	516
Variable Interest Entity, Primary Beneficiary | Related Party
Current assets
Receivables, net				58,707	62,420
Loans receivable, net				$ 0	$ 2,125

[1] The Company’s consolidated balance sheets include the assets and liabilities of its consolidated VIEs. The consolidated balance sheets include total assets that can be used only to settle obligations of the Company’s consolidated VIEs totaling $540.8 million and $579.8 million as of December 31, 2023 and December 31, 2022, respectively, and total liabilities of the Company’s consolidated VIEs for which creditors do not have recourse to the general credit of the primary beneficiary of $146.0 million and $149.6 million as of December 31, 2023 and December 31, 2022, respectively. These VIE balances do not include $273.2 million of investment in affiliates and $107.3 million of amounts due to affiliates as of December 31, 2023 and $304.8 million of investment in affiliates and $11.6 million of amounts due from affiliates as of December 31, 2022 as these are eliminated upon consolidation and not presented within the consolidated balance sheets. See Note 18 – “Variable Interest Entities (VIEs)” for further detail.