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Segment Information - Summary of Financial Information by Operating Segment, Goodwill (Detail) $ in Thousands | 9 Months Ended
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Sep. 30, 2020 USD ($)
Goodwill: |
Goodwill | $ 2,775,006
Accumulated impairment loss | (325,875)
Net goodwill, beginning balance | 2,449,131
Increase from contribution of redeemable noncontrolling interests | 20,300
Prior period purchase price adjustments | (40)
Foreign currency translation loss | (8,669)
Goodwill | 2,786,597
Accumulated impairment loss | (325,875)
Net goodwill, ending balance | 2,460,722
U.S. Facilities [Member] | Operating Segment [Member] |
Goodwill: |
Goodwill | 2,085,104
Net goodwill, beginning balance | 2,085,104
Increase from contribution of redeemable noncontrolling interests | 20,300
Prior period purchase price adjustments | (40)
Goodwill | 2,105,364
Net goodwill, ending balance | 2,105,364
U.K. Facilities [Member] | Operating Segment [Member] |
Goodwill: |
Goodwill | 689,902
Accumulated impairment loss | (325,875)
Net goodwill, beginning balance | 364,027
Foreign currency translation loss | (8,669)
Goodwill | 681,233
Accumulated impairment loss | (325,875)
Net goodwill, ending balance | $ 355,358

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