Noncontrolling Interests In Subsidiaries (Schedule Of Activity Of Noncontrolling Interests) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Noncontrolling Interest [Line Items]
Balance, value	$ 1,882,011
Net loss	(3,325)us-gaap_ProfitLoss	(17,628)us-gaap_ProfitLoss
Common unit distributions	(1,656)
Increase in noncontrolling interest in consolidated joint ventures	94
Balance, value	1,864,223
Noncontrolling Interests In Subsidiaries [Member]
Noncontrolling Interest [Line Items]
Balance, value	257,230	276,096
Net loss	(804)	(2,330)
Common unit distributions	(1,656)	(3,455)
Increase in noncontrolling interest in consolidated joint ventures	94
Redemption of common units for common stock	(857)	(6,452)
Rebalancing of ownership percentage between parent and subsidiaries	45	(21)
Balance, value	$ 254,052	$ 263,838

Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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