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Segment Information - Summary of Financial Information by Operating Segment, Goodwill (Detail) $ in Thousands | 6 Months Ended
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Jun. 30, 2019 USD ($)
Goodwill: |
Beginning balance | $ 2,396,412
Increase from 2019 acquisitions | 36,528
Increase from contribution of redeemable noncontrolling interests | 3,300
Foreign currency translation loss | (1,215)
Ending balance | 2,435,025
U.S. Facilities [Member] | Operating Segment [Member] |
Goodwill: |
Beginning balance | 2,044,837
Increase from 2019 acquisitions | 36,528
Increase from contribution of redeemable noncontrolling interests | 3,300
Ending balance | 2,084,665
U.K. Facilities [Member] | Operating Segment [Member] |
Goodwill: |
Beginning balance | 351,575
Foreign currency translation loss | (1,215)
Ending balance | $ 350,360

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