GOODWILL AND OTHER INTANGIBLE ASSETS - Amortizable Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
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