CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities:
Net income	$ 139,604	$ 99,938
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,955	12,440
Non-cash compensation	19,758	18,451
Non-cash 401(k) employer match	0	7,545
Amortization and impairment of operating lease right of use assets	29,149	27,014
(Gain) loss on disposal of property and equipment	(77)	6
Loss on sale of equity method investment	2,980	0
Write-off of other comprehensive income	(15)	0
Deferred income taxes	(2,762)	17,798
Equity in earnings from equity method investments	(2,399)	(4,120)
Amortization of deferred debt issuance costs/debt discount	653	653
Return on equity investment	3,919	3,727
Changes in operating assets and liabilities, net of impact of acquisitions:
Patient accounts receivable	6,486	(39,469)
Other current assets	(28,217)	(10,194)
Other assets	(91)	202
Accounts payable	(1,627)	(8,145)
Accrued expenses	25,594	27,903
Other long-term obligations	38,481	(231)
Operating lease liabilities	(25,576)	(24,116)
Operating lease right of use assets	(2,775)	(2,622)
Net cash provided by operating activities	223,040	126,780
Cash Flows from Investing Activities:
Proceeds from sale of deferred compensation plan assets	94	287
Proceeds from the sale of property and equipment	80	158
Purchases of property and equipment	(2,995)	(6,337)
Investments in equity method investees	(875)	(210)
Proceeds from sale of equity method investment	17,876	0
Acquisitions of businesses, net of cash acquired	(299,723)	(345,460)
Net cash used in investing activities	(285,543)	(351,562)
Cash Flows from Financing Activities:
Proceeds from issuance of stock upon exercise of stock options	6,070	3,388
Proceeds from issuance of stock to employee stock purchase plan	2,600	2,384
Shares withheld to pay taxes on non-cash compensation	(54,172)	(9,385)
Noncontrolling interest distribution	(672)	(910)
Proceeds from borrowings under term loan	0	175,000
Proceeds from borrowings under revolving line of credit	432,000	192,500
Repayments of borrowings under revolving line of credit	(357,000)	(133,000)
Principal payments of long-term obligations	(7,360)	(3,820)
Debt issuance costs	0	(847)
Provider relief fund advance	60,000	0
Net cash provided by financing activities	81,466	225,310
Net increase in cash, cash equivalents and restricted cash	18,963	528
Cash, cash equivalents and restricted cash at beginning of period	96,490	20,229
Cash, cash equivalents and restricted cash at end of period	115,453	20,757
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	4,902	7,756
Cash paid for income taxes, net of refunds received	30,290	17,656
Cash paid for operating lease liabilities	28,351	26,738
Cash paid for finance lease liabilities	1,483	792
Supplemental Disclosures of Non-Cash Activity:
Right of use assets obtained in exchange for operating lease liabilities	29,876	110,304
Right of use assets obtained in exchange for finance lease liabilities	822	1,806
Reductions to right of use assets resulting from reductions to operating lease liabilities	$ 767	$ 1,235