Consolidation Of Variable Interest Entities As A Non-Controlling Interest (Narrative) (Details)	3 Months Ended
	Mar. 31, 2017 USD ($) item	Mar. 31, 2016 item	Dec. 31, 2016 USD ($)
Variable Interest Entity [Line Items]
Total net book value	$ 509,000		$ 550,000
Net book value	1,832,291,000		1,807,010,000
Collateralized Financing Obligations [Member]
Variable Interest Entity [Line Items]
Long-term debt	84,800,000
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Net book value	56,401,000		62,477,000
Cash	20,382,000		$ 30,449,000
Variable Interest Entity, Primary Beneficiary [Member] | Term Loan [Member]
Variable Interest Entity [Line Items]
Long-term debt	$ 4,700,000
Variable Interest Entity, Primary Beneficiary [Member] | Containers [Member]
Variable Interest Entity [Line Items]
Number of types of container fund arrangements | item	2
Number of container portfolios sold | item	0	0
Total net book value	$ 201,900,000
Net book value	64,600,000
Gain (loss) recognized on initial consolidation of VIEs	0
Carrying value of assets sold	$ 10,700,000
Number of containers sold | item	0