CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash Flows from Operating Activities:
Net income	$ 32,046	$ 31,573
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,338	2,895
Non-cash compensation	5,909	6,615
401(k) employer match	3,291	2,379
Amortization and impairment of operating lease right of use assets	9,058	8,345
Loss (gain) on disposal of property and equipment	55	(4)
Write-off of other comprehensive income	(15)	0
Deferred income taxes	1,228	3,269
Equity in earnings from equity method investments	(477)	(1,216)
Amortization of deferred debt issuance costs/debt discount	220	213
Return on equity investment	2,369	725
Changes in operating assets and liabilities, net of impact of acquisitions:
Patient accounts receivable	(25,459)	(22,333)
Other current assets	(5,756)	(10,635)
Other assets	417	(338)
Accounts payable	(2,673)	(11,140)
Accrued expenses	(13,627)	18,838
Other long-term obligations	3,060	(144)
Operating lease liabilities	(8,132)	(8,139)
Operating lease right of use assets	(817)	(844)
Net cash provided by operating activities	6,035	20,059
Cash Flows from Investing Activities:
Proceeds from sale of deferred compensation plan assets	16	208
Proceeds from the sale of property and equipment	12	65
Purchases of property and equipment	(1,434)	(1,198)
Investments in equity method investees	0	(120)
Acquisitions of businesses, net of cash acquired	(69,349)	(327,867)
Net cash used in investing activities	(70,755)	(328,912)
Cash Flows from Financing Activities:
Proceeds from issuance of stock upon exercise of stock options	1,184	356
Proceeds from issuance of stock to employee stock purchase plan	860	782
Shares withheld upon stock vesting	(4,050)	(2,688)
Noncontrolling interest distribution	(360)	(366)
Proceeds from borrowings under term loan	0	175,000
Proceeds from borrowings under revolving line of credit	187,500	161,500
Repayments of borrowings under revolving line of credit	(37,500)	(34,000)
Principal payments of long-term obligations	(1,592)	(559)
Debt issuance costs	0	(847)
Net cash provided by financing activities	146,042	299,178
Net increase (decrease) in cash, cash equivalents and restricted cash	81,322	(9,675)
Cash, cash equivalents and restricted cash at beginning of period	96,490	20,229	$ 20,229
Cash, cash equivalents and restricted cash at end of period	177,812	10,554	$ 96,490
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	1,755	725
Cash paid for income taxes, net of refunds received	5,272	404
Cash paid for operating lease liabilities	8,949	8,983
Cash paid for finance lease liabilities	499	384
Supplemental Disclosures of Non-Cash Activity:
Right of use assets obtained in exchange for operating lease liabilities	6,437	91,743
Right of use assets obtained in exchange for finance lease liabilities	254	808
Reductions to right of use assets resulting from reductions to operating lease liabilities	$ 159	$ 625