Segment And Geographic Information (Schedule Of Segment Information) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenue		$ 115,567	$ 115,452	$ 105,705	$ 95,374	$ 94,034	$ 90,161	$ 82,692	$ 81,506	$ 432,098	$ 348,393	$ 294,354
Total operating expenses		72,578	72,571	65,786	60,658	57,631	58,267	57,924	63,555	271,593	237,377	241,068
Depreciation of rental equipment										121,298	110,952	104,877
Storage, handling and other expenses										14,545	20,918	35,862
Logistics transportation costs										97,170	68,155	51,980
(Gain) loss on sale of used rental equipment										(11,725)	(5,347)	12,671
Administrative expenses										50,305	42,699	35,678
Costs and Expenses		72,578	72,571	65,786	60,658	57,631	58,267	57,924	63,555	271,593	237,377	241,068
Operating income		42,989	$ 42,881	$ 39,919	$ 34,716	36,403	$ 31,894	$ 24,768	$ 17,951	160,505	111,016	53,286
Interest Income (Expense), Nonoperating, Net										(78,345)	(53,052)	(42,754)
Other Nonoperating Income (Expense)										(677)	(765)	(654)
Total other expenses										79,022	53,817	43,408
Income before income taxes and non-controlling interest										81,483	57,199	9,878
Goodwill		15,794				15,794				15,794	15,794	15,800	$ 15,800
Total assets	[1]	3,012,617				2,428,128				3,012,617	2,428,128
Purchase of rental equipment	[2]									812,021	502,050	251,165
Container Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue										284,924	235,365	202,328
Rail Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue										35,703	32,476	30,490
Logistics [Member]
Segment Reporting Information [Line Items]
Total revenue										111,471	80,552	61,536
Operating Segments [Member] | Container Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue										284,924	235,365	202,328
Total operating expenses										133,636	132,552	161,423
Depreciation of rental equipment										107,109	99,753	95,755
Storage, handling and other expenses										8,853	15,207	32,465
(Gain) loss on sale of used rental equipment										(9,886)	(5,333)	12,750
Administrative expenses										27,560	22,925	20,453
Costs and Expenses										133,636	132,552	161,423
Operating income										151,288	102,813	40,905
Interest Income (Expense), Nonoperating, Net										(62,572)	(41,815)	(35,784)
Other Nonoperating Income (Expense)										(677)	(765)	(654)
Total other expenses										63,249	42,580	36,438
Income before income taxes and non-controlling interest										88,039	60,233	4,467
Total assets		2,506,279				1,938,723				2,506,279	1,938,723
Purchase of rental equipment	[2]									739,944	445,168	118,374
Operating Segments [Member] | Rail Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue										35,703	32,476	30,490
Total operating expenses										23,339	21,556	16,300
Depreciation of rental equipment										14,189	11,199	9,122
Storage, handling and other expenses										5,692	5,615	3,386
(Gain) loss on sale of used rental equipment										(1,839)	(14)	33
Administrative expenses										5,297	4,756	3,759
Costs and Expenses										23,339	21,556	16,300
Operating income										12,364	10,920	14,190
Interest Income (Expense), Nonoperating, Net										(15,773)	(11,237)	(6,970)
Total other expenses										15,773	11,237	6,970
Income before income taxes and non-controlling interest										(3,409)	(317)	7,220
Total assets		460,387				449,376				460,387	449,376
Purchase of rental equipment	[2]									72,077	56,882	132,791
Operating Segments [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Total revenue										111,471	80,552	61,536
Total operating expenses										114,618	83,269	63,345
Storage, handling and other expenses											96	11
Logistics transportation costs										97,170	68,155	51,980
(Gain) loss on sale of used rental equipment												(112)
Administrative expenses										17,448	15,018	11,466
Costs and Expenses										114,618	83,269	63,345
Operating income										(3,147)	(2,717)	(1,809)
Income before income taxes and non-controlling interest										(3,147)	(2,717)	$ (1,809)
Goodwill		15,794				15,794				15,794	15,794
Total assets		$ 45,951				$ 40,029				$ 45,951	$ 40,029

[1] Total assets at December 31, 2018 and December 31, 2017 include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash, $25,211 and $20,685; Net investment in direct finance leases, $13,862 and $4,423; and Rental equipment net of accumulated depreciation, $71,958 and $61,842, respectively.

[2] Represents cash disbursements for purchasing of rental equipment as reflected in the consolidated statements of cash flows for the periods indicated