Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Beginning balance	$ 1,412,873	$ 1,347,611
Additions from acquisitions	1,167	54,578
Adjustments to prior year acquisitions	(453)	(83)
Effect of foreign currency translation	(23,938)	10,767
Ending balance	1,389,649	1,412,873
Full service center-based child care
Goodwill [Roll Forward]
Beginning balance	1,181,230	1,155,705
Additions from acquisitions	1,167	15,228
Adjustments to prior year acquisitions	(328)	(83)
Effect of foreign currency translation	(22,196)	10,380
Ending balance	1,159,873	1,181,230
Back-up care
Goodwill [Roll Forward]
Beginning balance	193,842	168,105
Additions from acquisitions	0	25,350
Adjustments to prior year acquisitions	0	0
Effect of foreign currency translation	(1,742)	387
Ending balance	192,100	193,842
Educational advisory services
Goodwill [Roll Forward]
Beginning balance	37,801	23,801
Additions from acquisitions	0	14,000
Adjustments to prior year acquisitions	(125)	0
Effect of foreign currency translation	0	0
Ending balance	$ 37,676	$ 37,801