Segment Information (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 segment ft	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of operating industry segments			1
Number of reportable segments			2
Revenues	$ 59,203,000	$ 53,898,000	$ 168,779,000	$ 157,844,000
Size of containers (in feet)			20
Net book value	1,058,000		1,058,000		1,390,000
Inter-Segment [Member]
Segment Reporting Information [Line Items]
Revenues			0
Railcar Equipment [Member]
Segment Reporting Information [Line Items]
Net book value	$ 78,300,000		$ 78,300,000