SEGMENTS (Summary of Segment Operating Results) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)
Segments reporting
Number of reportable segments | segment			3
Total revenues	$ 181,005	$ 308,639	$ 342,684	$ 540,401
Total operating expenses	189,566	254,729	348,706	441,839
Operating (loss) income before other items	(8,561)	53,910	(6,022)	98,562
Depreciation and amortization	(29,087)	(34,770)	(57,275)	(60,294)
Equity in earnings from real estate and other affiliates	16,299	9,834	30,685	18,354
Gains on sales of properties	0	0	0	32,215
Segment EBT	(8,296)	19,423	(5,904)	34,779
Net (loss) income	(5,879)	3,120	(4,045)	8,779
Net loss attributable to noncontrolling interests	791	0	431	0
Net (loss) income attributable to common stockholders	(5,088)	3,120	(3,614)	8,779
Operating Segments
Segments reporting
Total revenues	181,005	308,639	342,684	540,401
Total operating expenses	119,745	192,236	213,684	331,434
Operating (loss) income before other items	61,260	116,403	129,000	208,967
Depreciation and amortization	(26,886)	(32,814)	(53,205)	(56,363)
Interest (expense) income, net	(4,083)	(2,816)	(6,854)	(7,179)
Equity in earnings from real estate and other affiliates	16,299	9,834	30,685	18,354
Gains on sales of properties	0	0	0	32,215
Segment EBT	46,590	90,607	99,626	195,994
Operating Segments | Operating
Segments reporting
Total revenues	93,223	81,878	184,481	163,965
Total operating expenses	44,586	42,466	89,390	82,042
Operating (loss) income before other items	48,637	39,412	95,091	81,923
Depreciation and amortization	(25,688)	(32,244)	(50,861)	(55,033)
Interest (expense) income, net	(17,308)	(15,540)	(33,995)	(30,064)
Equity in earnings from real estate and other affiliates	(1,001)	37	1,585	3,422
Gains on sales of properties	0	0	0	0
Segment EBT	4,640	(8,335)	11,820	248
Operating Segments | MPC
Segments reporting
Total revenues	62,765	78,076	118,530	146,782
Total operating expenses	37,003	40,683	73,371	75,948
Operating (loss) income before other items	25,762	37,393	45,159	70,834
Depreciation and amortization	(85)	(79)	(166)	(171)
Interest (expense) income, net	6,808	5,990	13,200	11,547
Equity in earnings from real estate and other affiliates	14,100	9,792	25,228	15,072
Gains on sales of properties	0	0	0	0
Segment EBT	46,585	53,096	83,421	97,282
Operating Segments | Strategic
Segments reporting
Total revenues	25,017	148,685	39,673	229,654
Total operating expenses	38,156	109,087	50,923	173,444
Operating (loss) income before other items	(13,139)	39,598	(11,250)	56,210
Depreciation and amortization	(1,113)	(491)	(2,178)	(1,159)
Interest (expense) income, net	6,417	6,734	13,941	11,338
Equity in earnings from real estate and other affiliates	3,200	5	3,872	(140)
Gains on sales of properties	0	0	0	32,215
Segment EBT	(4,635)	45,846	4,385	98,464
Property damage repair charge			13,400
Corporate expenses and other items
Segments reporting
Corporate expenses and other items	$ 52,469	$ 87,487	$ 103,671	$ 187,215