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GOODWILL AND OTHER INTANGIBLE ASSETS - Amortizable Other Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | $ 621,097 | $ 608,332
Accumulated Amortization | 317,994 | 288,925
Net | 303,103 | 319,407
Total permits and other intangible assets, Cost | 743,857 | 730,800
Total permits and other intangible assets, Net | 425,863 | 441,875
Trademarks and trade names |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Accumulated Amortization | 0 | 0
Trademarks and trade names | 122,760 | 122,468
Permits |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | 182,667 | 177,583
Accumulated Amortization | 84,899 | 79,358
Net | 97,768 | 98,225
Customer and supplier relationships |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | 400,498 | 393,487
Accumulated Amortization | 200,766 | 179,824
Net | 199,732 | 213,663
Other intangible assets |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | 37,932 | 37,262
Accumulated Amortization | 32,329 | 29,743
Net | $ 5,603 | $ 7,519

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