|
Notes Payable, Unsecured Notes and Credit Facility (Details 3) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Unsecured notes
|
Nov. 30, 2012
Unsecured notes
|
Dec. 31, 2012
Unsecured notes
Minimum
|
Dec. 31, 2012
Unsecured notes
Maximum
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2013
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2014
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2016
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2017
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2020
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2021
|
Dec. 31, 2012
Unsecured notes
Notes payable maturing in 2022
|
Dec. 31, 2012
Unsecured notes
Notes payable with maturities after 2022
|
Dec. 31, 2012
Secured notes
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2013
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2014
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2015
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2016
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2017
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2018
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2019
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2020
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2021
|
Dec. 31, 2012
Secured notes
Notes payable maturing in 2022
|
Dec. 31, 2012
Secured notes
Notes payable with maturities after 2022
|
|
| Notes Payable, Unsecured Notes and Credit Facility | ||||||||||||||||||||||||||
| Secured notes payments | $ 175,691 | $ 13,375 | $ 14,284 | $ 12,170 | $ 12,807 | $ 13,709 | $ 14,330 | $ 2,597 | $ 2,768 | $ 2,952 | $ 3,147 | $ 83,552 | ||||||||||||||
| Mortgage notes payable and unsecured notes | $ 3,854,068 | $ 3,600,025 | $ 1,950,000 | $ 100,000 | $ 150,000 | $ 250,000 | $ 250,000 | $ 250,000 | $ 250,000 | $ 450,000 | $ 250,000 | $ 1,728,377 | $ 223,473 | $ 406,083 | $ 18,300 | $ 11,073 | $ 610,813 | $ 458,635 | ||||||||
| Stated interest rate of unsecured notes (as a percent) | 6.125% | 4.95% | 5.375% | 5.75% | 5.70% | 6.10% | 3.95% | 2.95% | 2.85% | |||||||||||||||||
| Percentage of principal amount at which the entity may redeem some or all of the notes | 100.00% | |||||||||||||||||||||||||
| Debt instrument, basis spread on variable rate (as a percent) | 0.25% | 0.45% | ||||||||||||||||||||||||