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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $) | Jul. 31, 2012 | Apr. 30, 2012
--- | --- | ---
Other assets |  |
Receivable arising from straight-lining of rents, allowance (in dollars) | $ 1,270,000 | $ 1,209,000
Accounts receivable, allowance (in dollars) | 334,000 | 154,000
Intangible assets, accumulated amortization (in dollars) | 49,357,000 | 47,813,000
Property and equipment, accumulated depreciation (in dollars) | 1,554,000 | 1,423,000
Deferred charges and leasing costs, accumulated amortization (in dollars) | 17,509,000 | 16,244,000
EQUITY |  |
Preferred Shares of Beneficial Interest, no par value (in dollars per share) | 0 | 0
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 | 0
Common Shares of Beneficial Interest, shares issued (in shares) | 91,811,928 | 89,473,838
Common Shares of Beneficial Interest, shares outstanding (in shares) | 91,811,928 | 89,473,838
Noncontrolling interests - Operating Partnership (in shares) | 21,170,797 | 20,332,415

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