Insurance Receivable And Impairment (Narrative) (Details) - Customer One, Filed For Court Protection [Member] - USD ($) $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	Jul. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Days covered of lost lease rental income		180 days
Percentage of containers on lease		91.00%
Lost lease rental income deductible		$ 2.0
Insurance receivable		4.8
Proceeds from insurance receivable		4.5
Dry Containers [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impairment			$ 3.2
Insurance receivable		5.5	3.8
Estimated proceeds		2.2	1.2
Recovery costs		$ 3.3	$ 2.6
Subsequent Event [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from insurance receivable	$ 3.5