Long-Term Incentive Plan Units (Roll-Forward of Company's LTIP Units Outstanding) (Details) - shares		3 Months Ended		9 Months Ended
	Sep. 11, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Exercised		(3,610)	(3,334)	(3,610)	(3,334)
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		14,552	14,440	14,552	16,163
Exercised		(3,610)	(3,334)	(3,610)	(3,334)
LTIP Units Outstanding, end of period		532,313	503,988	532,313	503,988
OP LTIP Units Unvested and Outstanding end of period		37,821		37,821
OP LTIP Units Vested and Outstanding end of period		494,492	467,823	494,492	467,823
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	14,552	14,552	14,440	14,552	16,163
Exercised		(3,610)	(3,334)	(3,610)	(3,334)
LTIP Units Outstanding, end of period		157,313	128,988	157,313	128,988
OP LTIP Units Unvested and Outstanding end of period		37,821		37,821
OP LTIP Units Vested and Outstanding end of period		119,492	92,823	119,492	92,823