Insurance Receivable and Impairment (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 1,786,374		$ 1,786,374		$ 1,748,211
Depreciation expense	29,873	$ 22,655	77,401	$ 65,907
Bad debt expense			$ 2,458	$ 326
Customer One, Filed For Court Protection [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Days covered of lost lease rental income			180 days
Dry Containers [Member] | Customer One, Filed For Court Protection [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	3,200		$ 3,200
Insurance receivable	1,400		1,400
Estimated proceeds	1,200
Recovery costs	200
Depreciation expense	2,000		2,000
Bad debt expense	$ 2,500		$ 2,500