Summary of Significant Accounting Policies - Additional Information (Details)		1 Months Ended	12 Months Ended
	Apr. 21, 2020 USD ($)	Apr. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) Center	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounting Policies [Line Items]
Net proceeds from offering	$ 249,800,000	$ 249,800,000
Book overdrafts			$ 12,500,000	$ 12,400,000
Estimated fair value for each reporting unit, forecast period			10 years
Goodwill impairment loss			$ 0	0	$ 0
Intangible assets impairment loss			0	0	0
Impairment on fixed assets and operating lease right-of-use assets			$ 26,227,000	261,000	0
Number of centers permanently closed | Center			88
Available-for-sale debt securities			$ 27,900,000	24,900,000
Debt securities, available-for-sale, amortized cost			27,900,000	24,900,000
Equity investments			1,200,000	3,200,000
Impairment losses on equity investment			2,128,000	0	$ 0
Governmental assistance, reduction to cost of services			83,500,000
Government support program receivables			8,372,000	0
Payroll tax deferrals			20,400,000
Prepaid expenses and other current assets
Accounting Policies [Line Items]
Available-for-sale debt securities			21,500,000	17,000,000.0
Government support program receivables			8,400,000
Other Assets
Accounting Policies [Line Items]
Available-for-sale debt securities			6,400,000	7,900,000
Accounts payable and accrued liabilities
Accounting Policies [Line Items]
Payroll tax deferrals			10,200,000
Other long-term liabilities
Accounting Policies [Line Items]
Payroll tax deferrals			$ 10,200,000
Provider of full service child care and back-up care service
Accounting Policies [Line Items]
Equity method ownership (as a percentage)			20.00%
Equity method investment			$ 6,700,000	$ 6,200,000
Full-service center-based child care
Accounting Policies [Line Items]
Number of business models | Center			2
Contract term, threshold for allocating revenue to the applicable contract year			1 year
Back-up care
Accounting Policies [Line Items]
Contract term			3 years
Impairment losses on equity investment			$ 2,100,000
Minimum
Accounting Policies [Line Items]
Finite lived intangible assets, estimated useful life			2 years
Operating lease term			10 years
Debt securities, available-for-sale, weighted average remaining maturity term			1 year
Minimum | Full-service center-based child care
Accounting Policies [Line Items]
Contract term			3 years
Minimum | Educational advisory and other services
Accounting Policies [Line Items]
Contract term			1 year
Maximum
Accounting Policies [Line Items]
Finite lived intangible assets, estimated useful life			17 years
Operating lease term			15 years
Debt securities, available-for-sale, weighted average remaining maturity term			1 year 6 months
Maximum | Full-service center-based child care
Accounting Policies [Line Items]
Contract term			10 years
Maximum | Educational advisory and other services
Accounting Policies [Line Items]
Contract term			3 years