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Notes Payable, Unsecured Notes and Credit Facility (Details 2) (USD $)
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6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2012
Mortgage notes payable
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Jan. 31, 2012
5.5% notes payable maturing in 2012
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Feb. 29, 2012
4.61% fixed-rate mortgage note
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May 31, 2012
Variable rate secured mortgage note
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Feb. 29, 2012
Variable rate secured mortgage note
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Jun. 30, 2012
Variable rate unsecured credit facility
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Dec. 31, 2011
Variable rate unsecured credit facility
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Jun. 30, 2012
Fixed rate mortgage notes payable
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Dec. 31, 2011
Fixed rate mortgage notes payable
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Jun. 30, 2012
Variable rate mortgage notes payable and Credit Facility
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Dec. 31, 2011
Variable rate mortgage notes payable and Credit Facility
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May 31, 2012
Other
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| Notes Payable, Unsecured Notes and Credit Facility | |||||||||||||
| Stated interest rate, percentage | 5.50% | 4.61% | |||||||||||
| Principal amount of debt repaid | $ 179,400,000 | $ 14,566,000 | $ 48,500,000 | $ 33,100,000 | |||||||||
| Debt assumed | 11,958,000 | ||||||||||||
| Loss on extinguishment of debt, net | 1,179,000 | 1,179,000 | 602,000 | ||||||||||
| Available borrowing capacity | 750,000,000 | ||||||||||||
| Term of debt instrument | 4 years | ||||||||||||
| Line of credit facility, extension period | 1 year | ||||||||||||
| Debt instrument variable rate | LIBOR | ||||||||||||
| Debt instrument, basis spread on variable rate (as a percent) | 1.075% | ||||||||||||
| Current interest rate (as a percent) | 1.32% | ||||||||||||
| Outstanding balance of letters of credit | 45,975,000 | 52,659,000 | |||||||||||
| Net carrying value of apartment communities and improved land parcels securing debt | 1,535,159,000 | ||||||||||||
| Mortgage notes payable held by wholly owned subsidiaries guaranteed by the Company | $ 179,777,000 | ||||||||||||
| Weighted average interest rate, debt (as a percent) | 5.70% | 5.70% | 2.60% | 2.30% | |||||||||