Basis Of Presentation (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Mar. 28, 2013
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	$ 29,871		$ 29,523
Shareholders' Equity [Abstract]
Aggregate Liquidation Preference			75,000
Repurchase of Common Shares	15,284
Repurchase of Common Stock (in shares)	2,626,854
Preferred Shares - Outstanding (in shares)	7,600,000		7,600,000
Proceeds from Issuance of Preferred Stock, Net	(86)	72,370
Preferred Stock, Redemption Price (in dollars per share)				$ 25.4056
Noncontrolling Interests Common Units [Member]
Noncontrolling Interest [Abstract]
Noncontrolling interests in Nonredeemable Common Units	29,871		29,523
Nonredeemable common units outstanding (in shares)	6,914,716
Fair market value of nonredeemable common units	44,047
Shareholders' Equity [Abstract]
Common units converted to Class A Common Shares (in shares)		(197,790)
Series A Preferred Shares [Member]
Shareholders' Equity [Abstract]
Distribution Rate	8.00%
Preferred Stock, Redemption Price (in dollars per share)				$ 25.00
Series C Preferred Shares [Member]
Shareholders' Equity [Abstract]
Aggregate Liquidation Preference	$ 75,000
Preferred Shares - Outstanding (in shares)	3,000,000		3,000,000
Distribution Rate	6.875%
Preferred Shares - Par Value (in dollars per share)	$ 0.01
Preferred Shares - Liquidation Preference Value (in dollars per share)	$ 25.00