GOODWILL AND OTHER INTANGIBLE ASSETS (Amortizable Other Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 613,323	$ 610,711
Accumulated Amortization	271,719	264,911
Net	341,604	345,800
Total permits and other intangible assets, Cost	736,354	734,039
Total permits and other intangible assets, Net	464,635	469,128
Indefinite lived trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite lived trademarks and trade names	123,031	123,328
Permits
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	174,867	174,721
Accumulated Amortization	75,493	74,347
Net	99,374	100,374
Customer and supplier relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	400,385	399,224
Accumulated Amortization	165,056	158,972
Net	235,329	240,252
Other intangible assets
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	38,071	36,766
Accumulated Amortization	31,170	31,592
Net	$ 6,901	$ 5,174