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Unsecured Lines Of Credit Payable (Tables) | 9 Months Ended
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Sep. 30, 2011
Unsecured Lines Of Credit Payable [Abstract] |
Lines Of Credit Unused And Available |
|  | Credit Facility No. 1 |  |  | Credit Facility No. 2 |
Committed capacity |  | $ | 75.0 |  |  | $ | 400.0 |
Borrowings outstanding |  |  | (74.0 | ) |  |  | (119.0 | )
Letters of credit issued |  |  | (0.8 | ) |  |  | (0.9 | )
Unused and available |  | $ | 0.2 |  |  | $ | 280.1 |
Repayments And Borrowings On Unsecured Lines Of Credit |
|  | Credit Facility No. 1 |  |  | Credit Facility No. 2 |
Balance at June 30, 2011 |  | $ | 74.0 |  |  | $ | 171.0 |
Borrowings |  |  | — |  |  |  | 58.0 |
Repayments |  |  | — |  |  |  | (110.0 | )
Balance at September 30, 2011 |  | $ | 74.0 |  |  | $ | 119.0 |

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