Partners' Capital (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Limited Partners' capital account, units issued | 14,985,550 | ' | 14,985,550 | ' | 14,985,550 |
Limited Partners' capital account, units outstanding | 14,985,550 | ' | 14,985,550 | ' | 14,985,550 |
Limited Partners' capital account, units authorized | 15,000,000 | ' | 15,000,000 | ' | 15,000,000 |
Partnership right to repurchase units of a unitholder | ' | ' | 100.00% | ' | ' |
Percentage of cash distributions from operations as incentive management fee | ' | ' | 4.00% | ' | ' |
Weighted average distributions per unit | $0 | $0 | $0 | $0 | $0.18 |
First [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from sales or refinancing as annual return on invested capital | ' | ' | 10.00% | ' | ' |
Initial Limited Partners [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Limited Partners' capital account, units issued | 50 | ' | 50 | ' | 50 |
Limited Partner [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Allocation of net income, net losses, and distributions | ' | ' | 92.50% | ' | ' |
Limited Partner [Member] | First [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from operations | ' | ' | 88.50% | ' | ' |
Percentage of cash distribution from sales or refinancing | ' | ' | 92.50% | ' | ' |
Limited Partner [Member] | Thereafter [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from sales or refinancing as annual return on invested capital | ' | ' | 10.00% | ' | ' |
Limited Partner [Member] | Second [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from operations | ' | ' | 85.00% | ' | ' |
Percentage of cash distribution from sales or refinancing | ' | ' | 85.00% | ' | ' |
General Partner [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Allocation of net income, net losses, and distributions | ' | ' | 7.50% | ' | ' |
General Partner [Member] | First [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from operations | ' | ' | 7.50% | ' | ' |
Percentage of cash distribution from sales or refinancing | ' | ' | 7.50% | ' | ' |
General Partner [Member] | Second [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from operations as incentive management fee | ' | ' | 7.50% | ' | ' |
Percentage of cash distribution from sales or refinancing | ' | ' | 7.50% | ' | ' |
Affiliated Entity [Member] | First [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from operations | ' | ' | 4.00% | ' | ' |
Affiliated Entity [Member] | Second [Member] | ' | ' | ' | ' | ' |
Limited Partners' Capital Account [Line Items] | ' | ' | ' | ' | ' |
Percentage of cash distributions from operations as incentive management fee | ' | ' | 7.50% | ' | ' |
Percentage of cash distribution from sales or refinancing | ' | ' | 7.50% | ' | ' |