GOODWILL AND OTHER INTANGIBLE ASSETS (Amortizable Other Intangible Assets) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 556,099,000		$ 558,605,000
Accumulated Amortization	158,672,000		152,089,000
Net	397,427,000		406,516,000
Weighted Average Remaining Amortization Period (in years)	11 years 2 months 12 days		11 years 4 months 18 days
Total permits and other intangible assets, Cost	678,717,000		682,169,000
Total permits and other intangible assets, Net	520,045,000		530,080,000
Amortization of intangible assets	11,000,000	9,500,000
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, cost	122,618,000		123,564,000
Permits
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	161,941,000		156,692,000
Accumulated Amortization	58,028,000		55,318,000
Net	103,913,000		101,374,000
Weighted Average Remaining Amortization Period (in years)	18 years 9 months 18 days		19 years 0 months 0 days
Customer and supplier relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	363,681,000		370,373,000
Accumulated Amortization	81,563,000		77,697,000
Net	282,118,000		292,676,000
Weighted Average Remaining Amortization Period (in years)	10 years 10 months 24 days		11 years 0 months 0 days
Other intangible assets
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	30,477,000		31,540,000
Accumulated Amortization	19,081,000		19,074,000
Net	$ 11,396,000		$ 12,466,000
Weighted Average Remaining Amortization Period (in years)	2 years 9 months 18 days		3 years 2 months 0 days