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Notes Payable (Tables) | 9 Months Ended
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Sep. 30, 2012
Notes Payable [Abstract] |
Summary Of Indebtedness | The following is a summary of our indebtedness:
| Balance at
(in millions) | September 30, 2012 |  | December 31, 2011
Commercial Banks |  |  |
Unsecured line of credit and short-term borrowings | $ | 34.0 |  |  | $ | — |
| 34.0 |  |  | — |
Senior unsecured notes |  |  |
5.93% Notes, due 2012 | 189.6 |  |  | 189.6 |
5.45% Notes, due 2013 | 199.8 |  |  | 199.7 |
5.08% Notes, due 2015 | 249.5 |  |  | 249.3 |
5.75% Notes, due 2017 | 246.3 |  |  | 246.2 |
4.70% Notes, due 2021 | 248.7 |  |  | 248.6 |
5.00% Notes, due 2023 | 247.4 |  |  | 247.3 |
| 1,381.3 |  |  | 1,380.7 |
Total unsecured notes payable | 1,415.3 |  |  | 1,380.7 |
Secured notes |  |  |
0.96% – 6.00% Conventional Mortgage Notes, due 2013 – 2045 | 940.3 |  |  | 1,012.3 |
1.35% Tax-exempt Mortgage Note due 2028 | 38.1 |  |  | 39.1 |
| 978.4 |  |  | 1,051.4 |
Total notes payable | $ | 2,393.7 |  |  | $ | 2,432.1 |
Floating rate tax-exempt debt included in secured notes (1.35%) | $ | 38.1 |  |  | $ | 39.1 |
Floating rate debt included in secured notes (0.96% - 1.69%) | 206.4 |  |  | 206.4 |
Scheduled Repayments On Outstanding Debt | Scheduled repayments on outstanding debt, including our line of credit and scheduled principal amortizations, and the weighted average interest rate on maturing debt at September 30, 2012 were as follows:
(in millions) | Amount |  | Weighted Average Interest Rate
2012 | $ | 190.3 |  |  | 5.9 | %
2013 (1) | 259.5 |  |  | 4.9 |
2014 | 11.0 |  |  | 6.0 |
2015 | 286.4 |  |  | 4.6 |
2016 (2) | 2.6 |  |  | — |
2017 and thereafter | 1,643.9 |  |  | 4.6 |
Total | $ | 2,393.7 |  |  | 4.8 | %
(1) Includes $31.5 million of secured debt which was repaid subsequent to September 30, 2012 in conjunction with the acquisition of the remaining 75% interest in a fully-consolidated joint venture. (2) Includes only scheduled principal amortizations.

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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