Long-Term Incentive Plan Units (Roll-Forward Of Company's LTIP Units Outstanding) (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Exercised	(1,947)	(1,822)	(1,782)
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	429,314	411,052	397,096
Granted	22,571	20,084	15,738
Exercised	(1,947)	(1,822)	(1,782)
LTIP Units Outstanding, end of period	449,938	429,314	411,052
LTIP Units Vested and Outstanding	421,120	404,859	395,314
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
Granted	0	0	0
Exercised	0	0	0
LTIP Units Outstanding, end of period	375,000	375,000	375,000
LTIP Units Vested and Outstanding	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	54,314	36,052	22,096
Granted	22,571	20,084	15,738
Exercised	(1,947)	(1,822)	(1,782)
LTIP Units Outstanding, end of period	74,938	54,314	36,052
LTIP Units Vested and Outstanding	46,120	29,859	20,314