Notes Payable (New Zealand Corporate Credit Facility) (Narrative) (Details)	12 Months Ended			12 Months Ended
	Dec. 31, 2013 Previous New Zealand Corporate Credit Facility [Member]	Feb. 08, 2012 Previous New Zealand Corporate Credit Facility [Member] USD ($)	Feb. 08, 2012 Previous New Zealand Corporate Credit Facility [Member] NZD	Dec. 31, 2013 New Zealand Corporate Credit Facility [Member] USD ($)	Dec. 31, 2013 New Zealand Corporate Credit Facility [Member] NZD
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 36,900,000	45,000,000	$ 32,800,000	40,000,000
Line of credit facility, term				3 years	3 years
Line of credit facility, decrease in maximum borrowing capacity				$ 4,100,000	5,000,000
Increase in spread on variable interest rate	0.55%
Spread on variable interest rate				2.00%	2.00%
Line of credit facility charge	0.30%			0.40%	0.40%