Partners' Capital (Schedule Of Cash Distribution Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Partners' Cash Distribution Activity [Line Items]
Cash distribution payment date	Feb. 15, 2013
Other Unitholders [Member]
Partners' Cash Distribution Activity [Line Items]
Distribution to partners	28,784
Cash distribution per unit	0.4875
Class C Convertible Preferred [Member]
Partners' Cash Distribution Activity [Line Items]
Distribution to partners	3,500
Cash distribution per unit	0.21
General Partner [Member]
Partners' Cash Distribution Activity [Line Items]
Distribution to partners	25
Class B Units [Member]
Partners' Cash Distribution Activity [Line Items]
Cash distribution payment date	May 15, 2013
Distribution to partners	2,990
Class B Units [Member] | Other Unitholders [Member]
Partners' Cash Distribution Activity [Line Items]
Cash distribution per unit	0.4875
Limited Partners-Public Common [Member]
Partners' Cash Distribution Activity [Line Items]
Distribution to partners	25,275
Limited Partners-Affiliated - Common [Member]
Partners' Cash Distribution Activity [Line Items]
Distribution to partners	3,484