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GOODWILL AND OTHER INTANGIBLE ASSETS - Amortizable Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | $ 621,557 | $ 608,332
Accumulated Amortization | 310,580 | 288,925
Net | 310,977 | 319,407
Total permits and other intangible assets, Cost | 744,433 | 730,800
Total permits and other intangible assets, Net | 433,853 | 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 | 122,876 | 122,468
Permits |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | 182,063 | 177,583
Accumulated Amortization | 83,278 | 79,358
Net | 98,785 | 98,225
Customer and supplier relationships |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | 401,296 | 393,487
Accumulated Amortization | 195,036 | 179,824
Net | 206,260 | 213,663
Other intangible assets |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items] |  |
Cost | 38,198 | 37,262
Accumulated Amortization | 32,266 | 29,743
Net | $ 5,932 | $ 7,519

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