GOODWILL AND INTANGIBLE ASSETS (Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Class) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		$ 1,256,039	$ 1,190,980
Accumulated amortization		(160,661)	(127,350)
Total Intangible Assets Subject to Amortization, net		1,095,378	1,063,630
Intangible Assets with Indefinite Lives		0	0
Total Intangible Assets, net		1,095,378	1,063,630
Amortization Expense for the Year		34,924	23,765	$ 17,565
Contractual Rights In Place [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		1,107,838	1,050,816
Accumulated amortization		(122,100)	(94,534)
Noncompetition Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		7,667	7,067
Accumulated amortization		(4,212)	(2,440)
Favorable Lease Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		9,479	9,479
Accumulated amortization		(3,533)	(3,179)
Permitting, Permitting Compliance And Zoning Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		126,538	119,002
Accumulated amortization		(27,464)	(24,352)
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	[1]	4,517	4,616
Accumulated amortization	[1]	$ (3,352)	$ (2,845)

[1] Includes customer relationships and tradenames and trademarks.