Members' Capital (Narrative) (Details)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Other Members Capital Account [Line Items]
Potential repurchase price of Units as a percentage of holder's capital account	100.00%
Other Members [Member]
Other Members Capital Account [Line Items]
Other Members capital account, units issued	13,560,188	13,560,188
Weighted average number of Units outstanding	13,560,188	13,560,188	13,560,188	13,560,188
Other Members capital account, units authorized	15,000,000	15,000,000
Allocation of net income, net losses and distribution allocation percentage	92.50%
Managing Member [Member]
Other Members Capital Account [Line Items]
Other Members capital account, units issued	50	50
Allocation of net income, net losses and distribution allocation percentage	7.50%