GOODWILL AND OTHER INTANGIBLE ASSETS (Amortizable Other Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 616,028	$ 608,332
Accumulated Amortization	299,693	288,925
Net	316,335	319,407
Total permits and other intangible assets, Cost	738,651	730,800
Total permits and other intangible assets, Net	438,958	441,875
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Trademarks and trade names	122,623	122,468
Permits
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	180,463	177,583
Accumulated Amortization	81,135	79,358
Net	99,328	98,225
Customer and supplier relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	397,949	393,487
Accumulated Amortization	187,195	179,824
Net	210,754	213,663
Other intangible assets
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	37,616	37,262
Accumulated Amortization	31,363	29,743
Net	$ 6,253	$ 7,519