Acquisitions (Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests) (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Fair value of consideration transferred:
Cash	$ 546,982	$ 67,493
Consideration transferred	546,982	68,025
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable	14,656	1,682
Prepaid expenses and other current assets	3,444	101
Operating lease right-of-use assets	2,852	1,499
Property and equipment	139,121	13,140
Current portion of operating lease liabilities	(947)	(658)
Deferred revenue	(4,877)	(1,620)
Long-term portion of operating lease liabilities	(1,905)	(841)
Other long-term liabilities		(1,900)
Deferred income taxes	(9,074)
Total identifiable net assets	249,367	18,235
Goodwill	297,615	49,790
Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities	(21,347)	(464)
Debt [Member]
Fair value of consideration transferred:
Liabilities incurred		532
Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Contingent consideration	(5,543)	(1,512)
Long Term Franchise Agreements And Contracts [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	17,482	615
Customer Lists [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	53,099	$ 8,193
Permits and Other [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	$ 62,406