Basis Of Presentation (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended					6 Months Ended		6 Months Ended	0 Months Ended	6 Months Ended
	Jun. 30, 2013	Mar. 28, 2013	Dec. 31, 2012	Jun. 30, 2013 Noncontrolling Interests Common Units [Member]	Dec. 31, 2012 Noncontrolling Interests Common Units [Member]	Jun. 30, 2013 Series A Preferred Shares [Member]	Mar. 28, 2013 Series A Preferred Shares [Member]	Jun. 30, 2013 Series B Preferred Shares [Member]	Feb. 25, 2013 Series C Preferred Shares [Member]	Jun. 30, 2013 Series C Preferred Shares [Member]
Class of Stock [Line Items]
Approximate ownership percentage in the Partnership (in hundredths)	96.70%
General partnership interest (in hundredths)	1.00%
Noncontrolling Interest [Abstract]
Noncontrolling interests in Nonredeemable Common Units	$ 29,167		$ 15,484	$ 29,167	$ 15,484
Nonredeemable common units outstanding (in shares)				6,914,716
Fair market value of nonredeemable common units				38,999
Redeemable Common Units outstanding (in shares)				0
Historical cost of Redeemable Common Units outstanding					11,753
Shareholders' Equity [Abstract]
Cumulative Redeemable Preferred shares sold (in shares)									3,000,000
Distribution Rate						8.00%		8.00%		6.875%
Preferred Shares - Liquidation Preference Value (in dollars per share)	$ 25		$ 25
Proceeds from issuance of preferred stock, net	$ 72,371								$ 72,371
Preferred Stock, Redemption Price (in dollars per share)		$ 25.4056					$ 25.00