Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Revenues	$ 402,010	$ 389,501	$ 1,187,818	$ 1,141,867
Operating expenses
Depreciation, depletion, and amortization	29,403	28,875	87,861	87,196
Selling, general and administrative	28,517	36,432	87,947	84,736
Loss (gain) from sale of real estate	12	83	(8,372)	83
Impairment of long-lived assets	0	0	747	8,773
Total operating expenses	358,457	362,059	1,059,030	1,048,917
Operating income	43,553	27,442	128,788	92,950
Other income (expense)
(Loss) income from investments in partially owned entities	(437)	9	(324)	(1,342)
Impairment of investments in partially owned entities	0	0	0	(6,496)
Interest expense	(22,834)	(29,218)	(70,258)	(85,233)
Interest income	877	218	2,610	785
Loss on debt extinguishment and modification	0	(386)	(21,385)	(986)
Foreign currency exchange gain (loss)	734	(1,045)	2,926	(3,870)
Other income (expense), net	96	148	184	(1,061)
Income (loss) before income tax benefit (expense)	21,989	(2,832)	42,541	(5,253)
Income tax benefit (expense):
Current	(3,063)	2,124	(672)	7,734
Deferred	(512)	349	2,093	4,379
Total income tax benefit (expense)	2,551	(1,775)	2,765	(3,355)
Net income (loss)	24,540	(4,607)	45,306	(8,608)
Less distributions on preferred shares of beneficial interest - Series A	0	(8)	(1)	(8)
Less distributions on preferred shares of beneficial interest - Series B	0	(7,108)	(1,817)	(21,326)
Less accretion on preferred shares of beneficial interest - Series B	0	(218)	0	(657)
Net income (loss) attributable to common shares of beneficial interest	$ 24,540	$ (11,941)	$ 43,488	$ (30,599)
Weighted average common shares outstanding – basic (in shares)	144,948	70,049	138,438	70,012
Weighted average common shares outstanding – diluted (in shares)	147,626	70,049	141,191	70,012
Net income (loss) per common share of beneficial interest - basic (in USD per share)	$ 0.17	$ (0.17)	$ 0.31	$ (0.44)
Net income (loss) per common share of beneficial interest - diluted (in USD per share)	$ 0.17	$ (0.17)	$ 0.31	$ (0.44)
Operating Segments
Revenues
Revenues	$ 402,010	$ 389,501	$ 1,187,818	$ 1,141,867
Operating expenses
Operating income	101,485	92,832	296,971	273,738
Operating Segments | Rent, storage, and warehouse services revenues
Revenues
Revenues	297,225	290,593	871,454	848,064
Operating expenses
Cost of operations	203,587	204,519	597,411	593,665
Operating income	93,638	86,074	274,043	254,399
Operating Segments | Third-party managed services
Revenues
Revenues	62,551	60,556	192,182	178,561
Operating expenses
Cost of operations	58,997	57,345	180,993	168,879
Operating income	3,554	3,211	11,189	9,682
Operating Segments | Transportation services
Revenues
Revenues	40,193	35,688	117,427	107,665
Operating expenses
Cost of operations	36,045	32,597	106,099	97,932
Operating income	4,148	3,091	11,328	9,733
Operating Segments | Other revenues
Revenues
Revenues	2,041	2,664	6,755	7,577
Operating expenses
Cost of operations	1,896	2,208	6,344	7,653
Operating income	$ 145	$ 456	$ 411	$ (76)