Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ 73,418	$ 433,490
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on disposal of assets and impairments	423,832	31,852
Depreciation	459,641	461,616
Amortization of intangibles	96,062	93,821
Amortization of leases	14,281	17,661
Deferred income taxes, net of acquisitions	(77,613)	41,481
Amortization of debt issuance costs	6,146	3,708
Share-based compensation	38,316	35,510
Interest accretion	12,843	12,283
Adjustments to contingent consideration	16,852	1,466
Other	936	(1,316)
Net change in operating assets and liabilities, net of acquisitions	120,859	53,858
Net cash provided by operating activities	1,185,573	1,185,430
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(173,810)	(420,392)
Capital expenditures for property and equipment	(420,694)	(433,526)
Capital expenditure for undeveloped landfill property	(66,809)	(31,683)
Proceeds from disposal of assets	11,564	2,626
Other	(317)	(2,697)
Net cash used in investing activities	(650,066)	(885,672)
Cash flows from financing activities:
Proceeds from long-term debt	1,790,625	1,021,795
Principal payments on notes payable and long-term debt	(1,505,641)	(1,184,165)
Payment of contingent consideration recorded at acquisition date	(2,812)	(1,621)
Change in book overdraft	(862)	1,911
Payments for repurchase of common shares	(105,654)
Payments for cash dividends	(145,921)	(126,348)
Tax withholdings related to net share settlements of equity-based compensation	(23,390)	(17,592)
Debt issuance costs	(11,117)	(5,938)
Proceeds from sale of common shares held in trust	679	4,036
Distributions to noncontrolling interests		(117)
Net cash provided by (used in) financing activities	(4,093)	(308,039)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	980	143
Net increase in cash, cash equivalents and restricted cash	532,394	(8,138)
Cash, cash equivalents and restricted cash at beginning of period	423,221	403,966
Cash, cash equivalents and restricted cash at end of period	955,615	395,828
Non-cash financing activities:
Liabilities assumed and notes payable issued to sellers of businesses acquired	$ 67,791	$ 94,009