LONG-LIVED ASSETS (Details) (USD $)	1 Months Ended	3 Months Ended					3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended				3 Months Ended
	Jan. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Property, plant and equipment excluding construction in progress and land and other	Dec. 31, 2013 Property, plant and equipment excluding construction in progress and land and other	Mar. 31, 2014 Pipelines	Dec. 31, 2012 Pipelines	Dec. 31, 2013 Pipelines	Mar. 31, 2014 Gas processing, treating and other plants	Dec. 31, 2012 Gas processing, treating and other plants	Dec. 31, 2013 Gas processing, treating and other plants	Mar. 31, 2014 Compressors	Dec. 31, 2012 Compressors	Dec. 31, 2013 Compressors	Mar. 31, 2014 Rights of way and easements	Dec. 31, 2012 Rights of way and easements	Dec. 31, 2013 Rights of way and easements	Mar. 31, 2014 Furniture, fixtures and equipment	Dec. 31, 2012 Furniture, fixtures and equipment	Dec. 31, 2013 Furniture, fixtures and equipment	Mar. 31, 2014 Capital lease vehicles	Dec. 31, 2013 Capital lease vehicles	Mar. 31, 2014 Capital lease vehicles Maximum [Member]	Mar. 31, 2014 Capital lease vehicles Minimum [Member]	Mar. 31, 2014 Construction in progress	Dec. 31, 2013 Construction in progress	Mar. 31, 2014 Land and other	Dec. 31, 2013 Land and other
Property, plant and equipment
Estimated useful life							30 years	30 years		15 years	15 years		7 years	7 years		15 years	15 years		5 years	5 years				5 years	3 years
Total property, plant and equipment		$ 689,426,000		$ 644,356,000			$ 381,052,000		$ 344,721,000	$ 258,101,000		$ 254,133,000	$ 20,144,000		$ 20,030,000	$ 24,998,000		$ 20,729,000	$ 3,428,000		$ 3,347,000	$ 1,703,000	$ 1,396,000
Accumulated depreciation and amortization		(88,414,000)		(79,908,000)
Property, plant and equipment, net		617,162,000		575,795,000	601,012,000	564,448,000																				10,960,000	6,039,000	5,190,000	5,308,000
Depreciation expense		8,528,000	7,249,000
Capitalized interest included in property, plant and equipment, net		99,000	600,000
Service charges	5,300,000
Amount recovered from insurance		1,000,000
Deductible amount	300,000
Intangible assets, net		$ 1,554,000	$ 1,554,000	$ 1,568,000
Finite-Lived Intangible Asset, Useful Life		30 years