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Acquisitions - Summary of Allocation of Purchase Price/Acquisition Costs (Detail) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Business Acquisition [Line Items] |  |
Goodwill | $ 1,902,685 | $ 1,919,386
2019 Acquisitions [Member] |  |
Business Acquisition [Line Items] |  |
Property, plant and equipment | 35,973 |
Goodwill | 20,088 |
Asset acquisition costs | 697 |
Current assets | 2,260 |
Current liabilities | (1,845) |
Operating lease right of use assets | 21,850 |
Operating lease liabilities | (20,149) |
Other assets | 52 |
Other liabilities | (1,500) |
Total | 215,869 |
2019 Acquisitions [Member] | Site Locations [Member] |  |
Business Acquisition [Line Items] |  |
Finite lived intangible assets | 135,658 |
2019 Acquisitions [Member] | Non-competition Agreements [Member] |  |
Business Acquisition [Line Items] |  |
Finite lived intangible assets | 210 |
2019 Acquisitions [Member] | Customer Lists and Contracts [Member] |  |
Business Acquisition [Line Items] |  |
Finite lived intangible assets | $ 22,575 |
2018 Acquisitions Excluding Fairway Assets [Member] |  |
Business Acquisition [Line Items] |  |
Property, plant and equipment |  | 8,648
Asset acquisition costs |  | 336
Current assets |  | 1,041
Current liabilities |  | (355)
Total |  | 73,638
2018 Acquisitions Excluding Fairway Assets [Member] | Site Locations [Member] |  |
Business Acquisition [Line Items] |  |
Finite lived intangible assets |  | 57,105
2018 Acquisitions Excluding Fairway Assets [Member] | Non-competition Agreements [Member] |  |
Business Acquisition [Line Items] |  |
Finite lived intangible assets |  | 342
2018 Acquisitions Excluding Fairway Assets [Member] | Customer Lists and Contracts [Member] |  |
Business Acquisition [Line Items] |  |
Finite lived intangible assets |  | $ 6,521

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