Consolidation Of Variable Interest Entities As A Non-Controlling Interest (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($) item		Dec. 31, 2014 USD ($) item
Variable Interest Entity [Line Items]
Total net book value	$ 550,000	$ 674,000	[1]
Net book value	1,807,010,000	1,748,211,000	[1]
Collateralized Financing Obligations [Member]
Variable Interest Entity [Line Items]
Long-term debt	100,000,000
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Net book value	62,477,000	85,101,000
Cash	30,449,000	$ 35,106,000	[1]
Variable Interest Entity, Primary Beneficiary [Member] | Term Loan [Member]
Variable Interest Entity [Line Items]
Long-term debt	$ 5,800,000
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		0
Total net book value	$ 201,900,000
Net book value	69,800,000
Gain (loss) recognized on initial consolidation of VIEs	0
Carrying value of assets sold	$ 36,200,000	$ 30,400,000		$ 40,400,000

[1] Amounts for the year ended December 31, 2015 have been restated for immaterial corrections of identified errors relating to prepaid loan fees (see Note 2 (b) "Correction of Immaterial Errors").