Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities
Net income	$ 177,117	$ 122,188
Adjustments to reconcile net income to net cash provided by operating activities:
Distributions from unconsolidated subsidiaries	8,841	11,140
Depreciation and amortization	102,364	102,120
Provision for expected credit losses	761	111
Equity in earnings of unconsolidated subsidiaries	(19,057)	(11,564)
Gain on sale or disposal of assets	(23)	(1,476)
Stock compensation expense	20,508	17,769
Amortization of debt discount, premium and issuance costs	1,174	1,123
Deferred income taxes	(10,876)	(1,965)
Changes in operating assets and liabilities, net of effects of business combinations:
Accounts receivable	(23,135)	(32,431)
Other current assets	(5,997)	(2,128)
Other assets	5,472	1,275
Accounts payable	7,096	4,879
Accrued expenses	22,033	44,296
Government advances	0	(77,319)
Net cash provided by operating activities	286,278	178,018
Investing activities
Business combinations, net of cash acquired	(7,732)	(19,241)
Purchases of property, equipment, and other assets	(118,399)	(93,177)
Investment in businesses	(9,800)	(6,990)
Proceeds from sale of assets	56	5,314
Net cash used in investing activities	(135,875)	(114,094)
Financing activities
Borrowings on revolving facilities	435,000	565,000
Payments on revolving facilities	(535,000)	(375,000)
Borrowings of other debt	22,298	17,494
Principal payments on other debt	(26,373)	(16,874)
Dividends paid to common stockholders	(31,821)	(32,799)
Repurchase of common stock	(1,506)	(178,623)
Decrease in overdrafts	(467)	(11,055)
Proceeds from issuance of non-controlling interests	14,812	6,955
Distributions to and purchases of non-controlling interests	(24,085)	(18,663)
Net cash used in financing activities	(147,142)	(43,565)
Net increase in cash and cash equivalents	3,261	20,359
Cash and cash equivalents at beginning of period	97,906	74,310
Cash and cash equivalents at end of period	101,167	94,669
Supplemental information
Cash paid for interest, excluding amounts received of $103 and $38,284 under the interest rate cap contract	133,581	74,217
Cash paid for taxes	$ 42,755	$ 16,423