Summary Of Significant Accounting Policies (Schedule of Sales Proceeds) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	[1]	Dec. 31, 2014	[1]
Property, Plant and Equipment [Line Items]
Sales proceeds	$ 66,073	$ 66,150		$ 65,637
3-year Avg. [Member] | 20-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	957
3-year Avg. [Member] | 40-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,172
3-year Avg. [Member] | 40-ft. High Cube Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,189
5-year Avg. [Member] | 20-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,076
5-year Avg. [Member] | 40-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,332
5-year Avg. [Member] | 40-ft. High Cube Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,346
7-year Avg. [Member] | 20-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,125
7-year Avg. [Member] | 40-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,396
7-year Avg. [Member] | 40-ft. High Cube Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,438
11-year Avg. [Member] | 20-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,109
11-year Avg. [Member] | 40-ft. Standard Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	1,358
11-year Avg. [Member] | 40-ft. High Cube Dry Van Container [Member]
Property, Plant and Equipment [Line Items]
Sales proceeds	$ 1,454

[1] Amounts for the years ended December 31, 2015 and 2014 have been restated for immaterial corrections of identified errors relating to prepaid loan fees (see Note 2 (b) "Correction of Immaterial Errors").