GOODWILL AND INTANGIBLE ASSETS (Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Class) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		$ 859,017	$ 835,667
Accumulated amortization		(92,438)	(77,424)
Total Intangible Assets Subject to Amortization, net		766,579	758,243
Intangible Assets with Indefinite Lives		0	0
Total Intangible Assets, net		766,579	758,243
Amortization Expense for the Year		15,618	10,966	$ 11,732
Goodwill, Impairment Loss		0	0	0
Impairment of Intangible Assets (Excluding Goodwill)		2,858	0	$ 0
Contractual Rights In Place [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		735,935	719,100
Accumulated amortization		(65,641)	(54,019)
Noncompetition Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		2,800	2,550
Accumulated amortization		(506)	(119)
Favorable Lease Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		16,677	16,677
Accumulated amortization		(4,002)	(3,489)
Permitting Permitting Compliance And Zoning Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		99,513	93,273
Accumulated amortization		(20,350)	(18,270)
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	[1]	4,092	4,067
Accumulated amortization	[1]	$ (1,939)	$ (1,527)

[1] Includes customer relationships and tradenames and trademarks.