Long-Term Incentive Plan Units Long-Term Incentive Plan Units (Unvested LTIP Units) (Details) - Long-Term Incentive Plan Units [Member]	9 Months Ended
	Sep. 30, 2017 shares
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	30,310
Director [Member]
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	10,002
LTIP Unit, Grant Date	Sep. 12, 2017
LTIP Unit, Vesting Date	Sep. 11, 2018	[1]
Vest December 13, 2017 [Member] | Dedicated or partially dedicated personnel [Member]
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	8,090
LTIP Unit, Grant Date	Dec. 13, 2016
LTIP Unit, Vesting Date	Dec. 13, 2017	[1]
Vest December 13, 2018 [Member] | Dedicated or partially dedicated personnel [Member]
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	5,583
LTIP Unit, Grant Date	Dec. 13, 2016
LTIP Unit, Vesting Date	Dec. 13, 2018	[1]
Vest December 15, 2017 [Member] | Dedicated or partially dedicated personnel [Member]
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	5,949
LTIP Unit, Grant Date	Dec. 15, 2015
LTIP Unit, Vesting Date	Dec. 15, 2017	[1]
Vest December 31, 2017 [Member] | Dedicated or partially dedicated personnel [Member]
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	686
LTIP Unit, Grant Date	Dec. 15, 2015
LTIP Unit, Vesting Date	Dec. 31, 2017	[1]

[1] Date at which such LTIP Units will vest and become non-forfeitable.