Long-Term Incentive Plan Units Long-Term Incentive Plan Units (Unvested LTIP Units) (Details) - Long-Term Incentive Plan Units [Member]	12 Months Ended
	Dec. 31, 2018 shares
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	39,432
Director [Member]
Schedule of Unvested LTIP Units [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Unvested	14,440
LTIP Unit, Grant Date	Sep. 12, 2018
LTIP Unit, Vesting Date	Sep. 11, 2019	[1]
Vest December 11, 2019 [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	8,692
LTIP Unit, Grant Date	Dec. 11, 2018
LTIP Unit, Vesting Date	Dec. 11, 2019	[1]
Vest December 11, 2020 [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	8,691
LTIP Unit, Grant Date	Dec. 11, 2018
LTIP Unit, Vesting Date	Dec. 11, 2020	[1]
Vest March 7, 2019 [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	1,723
LTIP Unit, Grant Date	Mar. 07, 2018
LTIP Unit, Vesting Date	Mar. 07, 2019	[1]
Vest December 12, 2019 [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	5,886
LTIP Unit, Grant Date	Dec. 12, 2017
LTIP Unit, Vesting Date	Dec. 12, 2019	[1]

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