Long-Term Incentive Plan Units (Roll-Forward Of Company's LTIP Units Outstanding) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Exercised	(1,250)	(1,250)	(3,750)
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	390,500	385,000	382,500
Granted	7,846	6,750	6,250
Exercised	(1,250)	(1,250)	(3,750)
LTIP Units Outstanding	397,096	390,500	385,000
LTIP Units Vested and Outstanding	389,250	383,750	378,750
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	375,000	375,000	375,000
Granted	0	0	0
Exercised	0	0	0
LTIP Units Outstanding	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	15,500	10,000	7,500
Granted	7,846	6,750	6,250
Exercised	(1,250)	(1,250)	(3,750)
LTIP Units Outstanding	22,096	15,500	10,000
LTIP Units Vested and Outstanding	14,250	8,750	3,750