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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Narrative (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Goodwill included in intangible assets acquired |  | $ 4,080,926 |  | $ 4,080,926 |  | $ 4,066,575 | $ 4,128,887
Total amortization expense related to definite-lived intangible assets |  | $ 49,600 | $ 56,800 | $ 98,700 | $ 112,100 |  |
Disposed of by sale | Indianapolis, Indiana market |  |  |  |  |  |  |
Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Cash proceeds from disposal | $ 43,100 |  |  |  |  |  |
Net gain related to sale | 28,900 |  |  |  |  |  |
Certain assets in Atlanta, Georgia |  |  |  |  |  |  |
Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Fair value of assets acquired | 39,400 |  |  |  |  |  |
Fixed assets acquired | 9,900 |  |  |  |  |  |
Intangible assets acquired | 29,500 |  |  |  |  |  |
Goodwill included in intangible assets acquired | 2,300 |  |  |  |  |  |
Other assets acquired | $ 0 |  |  |  |  |  |

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