Acquisitions - Summary of Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 01, 2021	Jun. 01, 2021	Jan. 13, 2021	Dec. 31, 2020	Aug. 10, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 5,078,978				$ 4,719,181		$ 4,833,047
ALE Solutions, Inc.
Business Acquisition [Line Items]
Current assets		$ 180,951
Long term assets		10,121
Goodwill		131,771
Intangibles		180,500
Current liabilities		(73,031)
Noncurrent liabilities		(8,479)
Aggregate purchase price		$ 421,833
AFEX
Business Acquisition [Line Items]
Trade and other receivables			$ 8,159
Prepaid expenses and other current assets			108,402
Property, plant and equipment			1,723
Other long term assets			51,074
Goodwill			254,399
Intangibles			242,300
Accounts payable and accrued expenses			(39,234)
Other current liabilities			(81,430)
Customer deposits			(375,049)
Other noncurrent liabilities			(99,614)
Aggregate purchase price			$ 70,730
Roger
Business Acquisition [Line Items]
Trade and other receivables				$ 110
Prepaid expenses and other current assets				37
Other long term assets				28
Goodwill				34,359
Intangibles				5,400
Current liabilities				(925)
Deferred tax liabilities				(6)
Aggregate purchase price				$ 39,003
Business in the lodging space
Business Acquisition [Line Items]
Trade and other receivables						$ 4,975
Prepaid expenses and other current assets						145
Property, plant and equipment						3,178
Other long term assets						1,049
Goodwill						28,038
Intangibles						42,144
Liabilities						(1,147)
Other noncurrent liabilities						(782)
Aggregate purchase price						$ 77,600