GOODWILL AND OTHER INTANGIBLE ASSETS (Amortizable Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 576,355	$ 567,678
Accumulated Amortization	196,781	183,186
Net	$ 379,574	$ 384,492
Weighted Average Remaining Amortization Period (in years)	9 years 223 days	10 years
Total permits and other intangible assets, Cost	$ 699,313	$ 690,004
Total permits and other intangible assets, Net	502,532	506,818
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, cost	122,958	122,326
Permits
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	164,160	161,396
Accumulated Amortization	63,179	61,142
Net	$ 100,981	$ 100,254
Weighted Average Remaining Amortization Period (in years)	18 years 117 days	19 years
Customer and supplier relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 379,339	$ 374,866
Accumulated Amortization	108,612	99,463
Net	$ 270,727	$ 275,403
Weighted Average Remaining Amortization Period (in years)	9 years 266 days	10 years 30 days
Other intangible assets
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 32,856	$ 31,416
Accumulated Amortization	24,990	22,581
Net	$ 7,866	$ 8,835
Weighted Average Remaining Amortization Period (in years)	1 year 102 days	1 year 6 months