Long-Term Incentive Plan Units (Roll-Forward of Company's LTIP Units Outstanding) (Details) - Long-Term Incentive Plan Units [Member] - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
LTIP Units Outstanding, beginning of period	545,716	521,371
Granted	14,811	0
Exercised	0	0
LTIP Units Outstanding, end of period	560,527	521,371
OP LTIP Units Unvested and Outstanding end of period	60,939	37,709
OP LTIP Units Vested and Outstanding end of period	499,588	483,662
Manager [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
LTIP Units Outstanding, beginning of period	365,518	375,000
Granted	0	0
Exercised	0	0
LTIP Units Outstanding, end of period	365,518	375,000
OP LTIP Units Unvested and Outstanding end of period	0	0
OP LTIP Units Vested and Outstanding end of period	365,518	375,000
Non-Manager [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
LTIP Units Outstanding, beginning of period	180,198	146,371
Granted	14,811	0
Exercised	0	0
LTIP Units Outstanding, end of period	195,009	146,371
OP LTIP Units Unvested and Outstanding end of period	60,939	37,709
OP LTIP Units Vested and Outstanding end of period	134,070	108,662