Partners' Capital (Narrative) (Details) - shares | 9 Months Ended | |
Sep. 30, 2015 | Dec. 31, 2014 |
Limited Partners' Capital Account [Line Items] | | |
Limited Partners' capital account, units issued | 14,985,550 | 14,985,550 |
Limited Partners' capital account, units outstanding | 14,985,550 | 14,985,550 |
Limited Partners' capital account, units authorized | 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% | |
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 |
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] | 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% | |
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% | |
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% | |