Acquisitions (Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair value of consideration transferred:
Cash	$ 960,449	$ 388,789	$ 736,610
Change in open working capital settlements at year end		1,505	5,272
Consideration transferred	1,068,794	481,643	837,691
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable	33,236	13,759	25,220
Prepaid expenses and other current assets	4,866	4,509	4,970
Operating lease right-of-use assets	5,972	5,247	3,616
Property and equipment	394,687	173,394	294,037
Indefinite-lived intangibles	9,557	13,465
Other assets	77	389	7
Current portion of operating lease liabilities	(1,370)	(509)	(658)
Deferred revenue	(8,389)	(1,821)	(17,245)
Long-term portion of operating lease liablities	(4,602)	(4,738)	(2,958)
Other long-term liabilities	(13,976)	(2,136)	(8,707)
Deferred income taxes	(63,822)	(4,525)	(13,287)
Total identifiable net assets	614,199	296,340	430,623
Goodwill	454,595	185,303	407,068
Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities	(37,827)	(14,174)	(19,209)
Debt [Member]
Fair value of consideration transferred:
Liabilities incurred	108,345	91,349	95,809
Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Contingent consideration	(31,616)	(4,688)	(14,038)
Long-Term Franchise Agreements and Contracts [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	134,827	59,149	78,312
Customer Lists [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	75,612	48,512	52,422
Permits and Other [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	$ 116,967	$ 10,507	$ 48,141

Acquisitions (Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests) (Details) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Fair value of consideration transferred:

Cash

$ 960,449

$ 388,789

$ 736,610

Change in open working capital settlements at year end

1,505

5,272