GOODWILL AND OTHER INTANGIBLE ASSETS (Finite-lived and Indefinite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite-lived intangible assets
Accumulated Amortization	$ 264,911	$ 223,219
Net	345,800
Total permits and other intangible assets, cost	734,039	721,940
Total permits and other intangible assets, net	469,128	498,721
Trademarks and trade names
Finite-lived intangible assets
Trademarks and trade names	123,328	122,623
Permits
Finite-lived intangible assets
Cost	174,721	171,637
Accumulated Amortization	74,347	67,301
Net	100,374	104,336
Customer and supplier relationships
Finite-lived intangible assets
Cost	399,224	393,426
Accumulated Amortization	158,972	127,462
Net	240,252	265,964
Other intangible assets
Finite-lived intangible assets
Cost	36,766	34,254
Accumulated Amortization	31,592	28,456
Net	5,174	5,798
Total amortizable permits and other intangible assets
Finite-lived intangible assets
Cost	610,711	599,317
Accumulated Amortization	264,911	223,219
Net	$ 345,800	$ 376,098