GOODWILL AND OTHER INTANGIBLE ASSETS (Amortizable Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 580,111		$ 580,111		$ 558,605
Accumulated Amortization	168,255		168,255		152,089
Net	411,856		$ 411,856		$ 406,516
Weighted Average Remaining Amortization Period (in years)			10 years 8 months 5 days		11 years 4 months 18 days
Total permits and other intangible assets, Cost	702,876		$ 702,876		$ 682,169
Total permits and other intangible assets, Net	534,621		534,621		530,080
Amortization of intangible assets	8,800	$ 8,900	19,800	$ 18,400
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible asset, cost	122,765		122,765		123,564
Permits
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	163,036		163,036		156,692
Accumulated Amortization	59,430		59,430		55,318
Net	103,606		$ 103,606		$ 101,374
Weighted Average Remaining Amortization Period (in years)			19 years 1 month 4 days		19 years
Customer and supplier relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	384,722		$ 384,722		$ 370,373
Accumulated Amortization	88,471		88,471		77,697
Net	296,251		$ 296,251		$ 292,676
Weighted Average Remaining Amortization Period (in years)			10 years 7 months 3 days		11 years
Other intangible assets
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	32,353		$ 32,353		$ 31,540
Accumulated Amortization	20,354		20,354		19,074
Net	$ 11,999		$ 11,999		$ 12,466
Weighted Average Remaining Amortization Period (in years)			2 years 4 months 18 days		3 years 2 months