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Segment Information - Summary of Financial Information by Operating Segment, Goodwill (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($)
Goodwill: |
Beginning balance | $ 2,396,412
Increase from 2019 acquisitions | 34,523
Increase from contribution of redeemable noncontrolling interests | 3,085
Foreign currency translation gain | 7,979
Ending balance | 2,441,999
U.S. Facilities [Member] | Operating Segment [Member] |
Goodwill: |
Beginning balance | 2,044,837
Increase from 2019 acquisitions | 34,523
Increase from contribution of redeemable noncontrolling interests | 3,085
Ending balance | 2,082,445
U.K. Facilities [Member] | Operating Segment [Member] |
Goodwill: |
Beginning balance | 351,575
Foreign currency translation gain | 7,979
Ending balance | $ 359,554

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