Segment And Geographic Information (Schedule Of Segment Information) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017		Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenue		$ 105,705	$ 82,692	$ 201,079	$ 164,198
Total operating expenses		65,786	57,924	126,444	121,479
Operating income		39,919	24,768	74,635	42,719
Total other expenses		18,869	12,173	35,733	24,159
Income before income taxes		21,050	12,595	38,902	18,560
Goodwill		15,794		15,794			$ 15,794
Total assets	[1]	2,720,458		2,720,458			$ 2,428,128
Purchase of rental equipment				271,961	128,593
Inter-Segment [Member]
Segment Reporting Information [Line Items]
Total revenue				0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue		105,705	82,692	201,079	164,198
Total operating expenses		65,786	57,924	126,444	121,479
Operating income		39,919	24,768	74,635	42,719
Total other expenses		18,869	12,173	35,733	24,159
Income before income taxes		21,050	12,595	38,902	18,560
Goodwill		15,794	15,794	15,794	15,794
Total assets		2,720,458	2,110,704	2,720,458	2,110,704
Purchase of rental equipment		159,198	80,477	271,961	128,593	[2]
Operating Segments [Member] | Container Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue		68,333	54,960	132,967	107,914
Total operating expenses		31,081	32,234	62,430	69,518
Operating income		37,252	22,726	70,537	38,396
Total other expenses		15,031	9,395	28,353	18,809
Income before income taxes		22,221	13,331	42,184	19,587
Total assets		2,211,492	1,684,166	2,211,492	1,684,166
Purchase of rental equipment		148,777	76,479	225,893	113,973	[2]
Operating Segments [Member] | Rail Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue		9,119	8,127	18,223	16,180
Total operating expenses		6,026	5,375	12,932	10,504
Operating income		3,093	2,752	5,291	5,676
Total other expenses		3,846	2,778	7,391	5,349
Income before income taxes		(753)	(26)	(2,100)	327
Total assets		465,513	386,648	465,513	386,648
Purchase of rental equipment		10,421	3,998	46,068	14,620	[2]
Operating Segments [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Total revenue		28,253	19,605	49,889	40,104
Total operating expenses		28,679	20,315	51,082	41,457
Operating income		(426)	(710)	(1,193)	(1,353)
Total other expenses		(8)		(11)	1
Income before income taxes		(418)	(710)	(1,182)	(1,354)
Goodwill		15,794	15,794	15,794	15,794
Total assets		$ 43,453	$ 39,890	$ 43,453	$ 39,890

[1] Total assets at June 30, 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, $24,348 and $20,685; Net investment in direct finance leases, $9,004 and $4,423; and Rental equipment, net of accumulated depreciation, $62,320 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.