SEGMENT REPORTING - REVENUE, PROPERTY, PLANT AND EQUIPMENT AND INTANGIBLE ASSETS OUTSIDE OF THE UNITED STATES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, plant and equipment, net	$ 1,531,763,000	$ 903,947,000
Permits and other intangibles, net	572,817,000	139,644,000
United States and Puerto Rico [Member]
Revenue for reportable segment	1,254,200,000	1,149,400,000	1,144,100,000
Segment reporting information revenue percent	57.33%	57.90%	66.10%
Canada
Revenue for reportable segment	933,000,000	833,600,000	586,400,000
Segment reporting information revenue percent	42.60%	42.00%	33.90%
Property, plant and equipment, net	640,600,000	509,600,000
Permits and other intangibles, net	$ 78,800,000	$ 74,900,000
Property Plant And Equipment Net Percent	41.80%	56.40%
Intangible Assets Net Excluding Goodwill Percent	13.80%	53.70%
Other Interest Income [Member]
Segment reporting information revenue percent	1.00%	1.00%	1.00%