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Common Shares | 6 Months Ended
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Jun. 30, 2011
Common Shares |
Common Shares |
| 4. | Common Shares
We currently have an automatic shelf registration statement on file with the SEC which allows us to offer, from time to time, an unlimited amount of common shares, preferred shares, debt securities, or warrants. Our declaration of trust provides we may issue up to 110.0 million shares of beneficial interest, consisting of 100.0 million common shares and 10.0 million preferred shares. As of June 30, 2011, we had approximately 70.7 million common shares outstanding, net of treasury shares and shares held in our deferred compensation arrangements, and no preferred shares outstanding. In March 2010, we originated an at-the-market ("ATM") share offering program through which we could, but had no obligation to, sell common shares having an aggregate offering price of up to $250 million ("2010 ATM program"), in amounts and at times as we determined, into the existing trading market at current market prices as well as through negotiated transactions. The 2010 ATM program has been terminated and no further common shares are available for sale under the 2010 ATM program. The following table presents activity under our 2010 ATM share offering program for the periods presented (in millions, except per share amounts):
|  | Three Months Ended June 30, 2011 |  |  | Six Months Ended June 30, 2011 |
Common shares sold |  |  | 0.2 |  |  |  | 0.3 |
Total net consideration |  | $ | 10.0 |  |  | $ | 13.8 |
Average price per share |  | $ | 56.50 |  |  | $ | 55.81 |
In May 2011, we originated an ATM share offering program through which we can sell common shares having an aggregate offering price of up to $300 million ("2011 ATM program") from time to time into the existing trading market at current market prices as well as through negotiated transactions. We may, but have no obligation to, sell common shares through the 2011 ATM share offering program in amounts and at times as we determine. Actual sales from time to time may depend on a variety of factors, including, among others, market conditions, the trading price of our common shares, and determinations of the appropriate sources of funding for us. The following table presents activity under our 2011 ATM program for the period presented (in millions, except per share amounts):
|  | Three Months Ended June 30, 2011 |
Common shares sold |  |  | 0.4 |
Total net consideration |  | $ | 23.3 |
Average price per share |  | $ | 64.52 |
During July of 2011, we sold approximately 0.5 million common shares under the 2011 ATM program at an average price of $65.77 per share for total net consideration of approximately $32.4 million. As of the date of this filing, we had common shares having an aggregate offering price of up to $243.3 million remaining available for sale under the 2011 ATM program.

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- Definition Disclosures related to accounts comprising shareholders' equity, including other comprehensive income. Includes: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables; effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C, E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 1 -Section B -Paragraph 7, 11A Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Article 4 + Details
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