Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 357,221	$ 188,720
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, accretion, and amortization	524,541	530,266
(Gain) loss on remeasurement of U.S. denominated intercompany loans	(8,501)	42,582
Non-cash compensation expense	74,140	59,175
Non-cash asset impairment and decommission costs	25,202	17,935
Loss from extinguishment of debt, net		12,672
Deferred income tax provision (benefit)	15,532	(2,711)
Other non-cash items reflected in the Statements of Operations	55,013	58,725
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable and costs and estimated earnings in excess of billings on uncompleted contracts, net	(33,895)	(6,371)
Prepaid expenses and other assets	(31,446)	(25,589)
Operating lease right-of-use assets, net	104,771	86,717
Accounts payable and accrued expenses	13,062	8,465
Accrued interest	(23,982)	(27,873)
Long-term lease liabilities	(96,092)	(83,885)
Other liabilities	21,500	32,502
Net cash provided by operating activities	997,066	891,330
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions	(418,721)	(1,187,754)
Capital expenditures	(148,348)	(90,407)
Purchase of investments	(506,581)	(755,530)
Proceeds from sale of investments	482,835	755,280
Other investing activities	(496)	589
Net cash used in investing activities	(591,311)	(1,277,822)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under Revolving Credit Facility	330,000	810,000
Repayments under Revolving Credit Facility	(270,000)	(1,190,000)
Proceeds from issuance of Senior Notes, net of fees		1,485,512
Repayment of Senior Notes		(757,500)
Proceeds from issuance of Tower Securities, net of fees		1,152,437
Repayment of Tower Securities		(760,000)
Repurchase and retirement of common stock	(431,666)	(284,343)
Payment of dividends on common stock	(230,102)	(190,456)
Proceeds from employee stock purchase/stock option plans	33,745	73,152
Payments related to taxes on stock options and restricted stock units	(9,905)	(9,025)
Other financing activities	11,860	(21,165)
Net cash (used in) provided by financing activities	(566,068)	308,612
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	4,561	(10,529)
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(155,752)	(88,409)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH:
Beginning of period	435,626	342,808
End of period	279,874	254,399
Cash paid during the period for:
Interest	277,219	298,589
Income taxes	18,848	20,153
SUPPLEMENTAL CASH FLOW INFORMATION OF NON-CASH ACTIVITIES:
Right-of-use assets obtained in exchange for new operating lease liabilities	137,126	27,691
Operating lease modifications and reassessments	36,181	21,829
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 3,701	$ 1,765