Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income (loss)	$ 404,575	$ 337,408
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on disposal of assets and impairments	6,048	6,229
Depreciation	368,887	326,624
Amortization of intangibles	75,098	64,899
Deferred income taxes, net of acquisitions	84,991	3,520
Current period provision for expected credit losses	6,907	4,903
Amortization of debt issuance costs	2,484	2,689
Share-based compensation	27,716	28,724
Interest accretion	8,798	8,199
Payment of contingent consideration recorded in earnings		(520)
Adjustments to contingent consideration	(1,030)	89
Other	(2,173)	(1,118)
Net change in operating assets and liabilities, net of acquisitions	(8,623)	66,832
Net cash provided by operating activities	973,678	848,478
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(546,982)	(67,493)
Capital expenditures for property and equipment	(371,428)	(271,392)
Proceeds from disposal of assets	16,894	7,906
Other	9,566	(1,815)
Net cash used in investing activities	(891,950)	(332,794)
Cash flows from financing activities:
Proceeds from long-term debt	1,517,732	311,000
Principal payments on notes payable and long-term debt	(920,107)	(267,050)
Payment of contingent consideration recorded at acquisition date	(8,898)	(5,595)
Change in book overdraft	(54)	(190)
Payments for repurchase of common shares	(424,999)	(305,640)
Payments for cash dividends	(118,812)	(107,330)
Tax withholdings related to net share settlements of equity-based compensation	(17,266)	(18,510)
Debt issuance costs	(4,668)
Proceeds from issuance of shares under employee share purchase plan	1,554
Proceeds from sale of common shares held in trust	660	131
Net cash provided by (used in) financing activities	25,142	(393,184)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,941)	873
Net increase in cash, cash equivalents and restricted cash	104,929	123,373
Cash, cash equivalents and restricted cash at beginning of period	219,615	714,389
Cash, cash equivalents and restricted cash at end of period	324,544	837,762
Non-cash financing activities:
Liabilities assumed and notes payable issued to sellers of businesses acquired	$ 43,693	$ 7,527