Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($) shares in Millions	12 Months Ended			60 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Loss Contingencies [Line Items]
Rent expense	$ 49,400,000	$ 51,100,000	$ 56,000,000
Liability for future lease payments, net of anticipated sublease rental income	221,937,000
Business acquisition cash remain to be paid if targets met	20,900,000
Self insurance accrued in health care claims	400,000	1,200,000		$ 1,200,000
Contingent liability
Vacant Space
Loss Contingencies [Line Items]
Liability for future lease payments, net of anticipated sublease rental income	0	0	$ 0	0
Indemnification
Loss Contingencies [Line Items]
Contingent liability	0
Guarantees
Loss Contingencies [Line Items]
Guarantee liability	1,800,000	$ 1,000,000		$ 1,000,000
Class A Common Stock
Loss Contingencies [Line Items]
Consideration transferred of Class A common stock (in shares)				2.2
Estimated fair value of contingent consideration	9,200,000
Business acquisition, contingent cash consideration	$ 37,500,000
Class A Common Stock | Business Acquisition With Issuance Of Stock
Loss Contingencies [Line Items]
Business acquisition, equity interest issued (in shares)	1.8
Class A Common Stock | Contingent Consideration Issuable
Loss Contingencies [Line Items]
Payments to acquire businesses	$ 30,400,000
Class A Common Stock | Contingent Consideration Issuable | Business Acquisition With Issuance Of Stock
Loss Contingencies [Line Items]
Business acquisition, equity interest issued (in shares)	0.5
LPUs
Loss Contingencies [Line Items]
Consideration transferred of Class A common stock (in shares)				0.1
Estimated fair value of contingent consideration	$ 200,000
Restricted Stock Units (RSUs)
Loss Contingencies [Line Items]
Consideration transferred of Class A common stock (in shares)		3.1		0.2
Estimated fair value of contingent consideration	1,200,000
Business acquisition, contingent cash consideration	11,800,000	$ 20,600,000		$ 20,600,000
Increase (decrease) to contingent liability	$ 3,700,000	$ 3,600,000
Restricted Stock Units (RSUs) | Business Acquisition With Issuance Of Stock
Loss Contingencies [Line Items]
Consideration transferred of Class A common stock (in shares)	0.1
Restricted Stock Units (RSUs) | Class A Common Stock | Contingent Consideration Issuable
Loss Contingencies [Line Items]
Business acquisition, contingent cash consideration	$ 200,000