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