GOODWILL AND INTANGIBLE ASSETS (Gross Carrying Amount and Accumulated Amortization by Major Intangible Asset Class) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 835,667	$ 776,909
Accumulated amortization	(77,424)	(79,331)
Total Intangible Assets Subject to Amortization, net	758,243	697,578
Intangible Assets with Indefinite Lives	0	0
Total Intangible Assets, net	758,243	697,578
Amortization expense for the year	10,966	11,732	11,869
Contractual Rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	812,373	737,619
Accumulated amortization	(72,289)	(65,461)
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2,550	1,200
Accumulated amortization	(119)	(925)
Favorable Lease Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	16,677	16,677
Accumulated amortization	(3,489)	(3,053)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	3,555	14,393
Accumulated amortization	(1,459)	(7,275)
Trade names and Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	0	5,006
Accumulated amortization	0	(2,587)
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	512	2,014
Accumulated amortization	$ (68)	$ (30)