Long-Term Incentive Plan Units (Roll-Forward of Company's LTIP Units Outstanding) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Exercised	0	0	0	0
Long-Term Incentive Plan Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
LTIP Units Outstanding, beginning of period	521,371	492,882	521,371	491,159
Granted	0	0	0	1,723
Exercised	0	0	0	0
LTIP Units Outstanding, end of period	521,371	492,882	521,371	492,882
OP LTIP Units Unvested and Outstanding end of period	37,709		37,709
OP LTIP Units Vested and Outstanding end of period	483,662	461,155	483,662	461,155
Manager [Member] | Long-Term Incentive Plan Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
LTIP Units Outstanding, beginning of period	375,000	375,000	375,000	375,000
Granted	0	0	0	0
Exercised	0	0	0	0
LTIP Units Outstanding, end of period	375,000	375,000	375,000	375,000
OP LTIP Units Unvested and Outstanding end of period	0		0
OP LTIP Units Vested and Outstanding end of period	375,000	375,000	375,000	375,000
Non-Manager [Member] | Long-Term Incentive Plan Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
LTIP Units Outstanding, beginning of period	146,371	117,882	146,371	116,159
Granted	0	0	0	1,723
Exercised	0	0	0	0
LTIP Units Outstanding, end of period	146,371	117,882	146,371	117,882
OP LTIP Units Unvested and Outstanding end of period	37,709		37,709
OP LTIP Units Vested and Outstanding end of period	108,662	86,155	108,662	86,155