Acquisitions and Dispositions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Aug. 02, 2021
Business Acquisition [Line Items]
Goodwill	$ 1,651,475	$ 1,652,723
Goodstuff Holdings Limited
Business Acquisition [Line Items]
Cash and cash equivalents		30,985
Accounts receivable		28,685
Other current assets		3,207
Fixed assets		237
Right-of-use lease assets - operating leases		2,060
Intangible assets		14,974
Other assets		55
Accounts payable		(6,344)
Accruals and other liabilities		(27,353)
Advance billings		(15,956)
Current portion of lease liabilities		(857)
Income taxes payable		(967)
Long-term portion of lease liabilities		(3,744)
Other liabilities		(1,204)
Net liabilities assumed		23,778
Goodwill		4,275
Purchase price consideration		$ 28,053
MDC
Business Acquisition [Line Items]
Cash and cash equivalents			$ 130,153
Accounts receivable			413,839
Other current assets			41,736
Fixed assets			80,047
Right-of-use lease assets - operating leases			253,629
Intangible assets			810,900
Other assets			18,418
Accounts payable			(171,019)
Accruals and other liabilities			(307,699)
Advance billings			(211,403)
Current portion of lease liabilities			(48,517)
Current portion of deferred acquisition consideration			(53,054)
Long-term debt			(901,736)
Revolving credit facility			(109,954)
Long-term portion of deferred acquisition consideration			(8,056)
Long-term portion of lease liabilities			(289,128)
Other liabilities			(132,394)
Redeemable noncontrolling interests			(25,990)
Preferred shares			(209,980)
Noncontrolling interests			(151,090)
Net liabilities assumed			(871,298)
Goodwill			1,300,360
Purchase price consideration			$ 429,062