The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

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Subsequent Events (Details) (USD $)	1 Months Ended
Subsequent Events (Details) (USD $)	Jul. 31, 2012 One Court Square	Nov. 30, 2011 One Court Square	Jul. 31, 2012 Joint venture One Court Square Sale of property	Jul. 31, 2012 Series D Preferred Stock Redemption of preferred stock	Jul. 13, 2012 Series D Preferred Stock Redemption of preferred stock
Subsequent Events
Preferred stock redeemed (in shares)					4,000,000
Preferred stock Redemption (in dollars per share)					$ 25.00
Accumulated and unpaid dividends on preferred stock (in dollars per share)				$ 0.4922
Sales price	$ 481,100,000	$ 475,600,000	$ 481,100,000
Existing debt assumed by purchaser			$ 315,000,000