Revenue Recognition - Schedule of Total Revenue Between Education Centers and School Sites (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 671,476	$ 624,468	$ 2,016,079	$ 1,892,186
Early Childhood Education Centers
Disaggregation of Revenue [Line Items]
Revenue	626,439	585,919	1,872,894	1,774,767
Before- and After-School Sites
Disaggregation of Revenue [Line Items]
Revenue	$ 45,037	$ 38,549	$ 143,185	$ 117,419