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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Apr. 30, 2011 | Apr. 30, 2010
--- | --- | ---
Real estate investments |  |
Mortgage loans receivable, net of allowance (in dollars) | $ 3 | $ 3
Other assets |  |
Receivable arising from straight-lining of rents, net of allowance (in dollars) | 996 | 912
Accounts receivable, net of allowance (in dollars) | 317 | 257
Intangible assets, net of accumulated amortization (in dollars) | 42,154 | 39,571
Property and equipment, net of accumulated depreciation (in dollars) | 1,231 | 924
Deferred charges and leasing costs, net of accumulated amortization (in dollars) | 13,675 | 13,131
EQUITY |  |
Preferred Shares of Beneficial Interest, no par value (in dollars per share) | $ 0.0000 | $ 0.0000
Preferred Shares of Beneficial Interest, shares issued (in shares) | 1,150,000 | 1,150,000
Preferred Shares of Beneficial Interest, shares outstanding (in shares) | 1,150,000 | 1,150,000
Preferred Shares of Beneficial Interest, aggregate liquidation preference (in dollars) | $ 28,750,000 | $ 28,750,000
Common Shares of Beneficial Interest, no par value (in dollars per share) | $ 0.0000 | $ 0.0000
Common Shares of Beneficial Interest, shares issued (in shares) | 80,523,265 | 75,805,159
Common Shares of Beneficial Interest, shares outstanding (in shares) | 80,523,265 | 75,805,159
Noncontrolling interests - Operating Partnership (in shares) | 20,067,350 | 20,521,365

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