Investments (Narrative) (Details) (USD $)	9 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended	0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 General Finance Incorporated (GFI) [Member]	Sep. 30, 2013 General Finance Incorporated (GFI) [Member]	Sep. 30, 2014 General Finance Incorporated (GFI) [Member]	Sep. 30, 2013 General Finance Incorporated (GFI) [Member]	Dec. 31, 2013 General Finance Incorporated (GFI) [Member]	Oct. 21, 2014 Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Decrease in temporary impairment losses									$ (51,000)
Decrease in temporary impairment losses (percent)									(51.20%)
Payment for acquisition of equity method investments	(528,465)	0				(500,000)		(700,000)
Ownership percentage				22.77%		22.77%		19.34%
Investments	28,806,279		24,756,294
Transactions with equity-method investee				$ 200,000	$ 200,000	$ 700,000	$ 600,000