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v2.3.0.11

Debt Obligations (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Consolidated debt obligations |  |
Long-term Debt, Gross |  | $ 59,800
Plus: unamortized fixed-rate debt premiums (discounts), net | 7,427 |
Less: unamortized exchangeable debt discount | 400 | 900
Total mortgage indebtedness | 588,823 | 711,789
Total unsecured indebtedness | 2,466,021 |
Arboretum I, II, III & V [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 0 | 20,386
Effective interest rate | 7.59% |
Debt Instrument, Maturity Date | Jul-11 |
Midlantic Drive/Lenox Drive/DCC I [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 0 | 56,514
Effective interest rate | 8.05% |
Debt Instrument, Maturity Date | Oct-11 |
Research Office Center [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 0 | 39,145
Effective interest rate | 5.30% |
Debt Instrument, Maturity Date | Oct-11 |
Concord Airport Plaza [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 33,914 | 34,494
Effective interest rate | 5.55% |
Debt Instrument, Maturity Date | Jan-12 |
Newtown Square/Berwyn Park/Libertyview [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 57,334 | 58,102
Effective interest rate | 7.25% |
Debt Instrument, Maturity Date | May-13 |
Southpoint III [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 2,249 | 2,597
Effective interest rate | 7.75% |
Debt Instrument, Maturity Date | Apr-14 |
Tysons Corner [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 95,698 | 96,507
Effective interest rate | 5.36% |
Debt Instrument, Maturity Date | Aug-15 |
Two Logan Square [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 89,800 | 89,800
Effective interest rate | 7.57% |
Debt Instrument, Maturity Date | Apr-16 |
One Logan Square [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 60,000 | 60,000
Effective interest rate | 4.50% |
Debt Instrument, Maturity Date | Jul-16 |
IRS Philadelphia Campus [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 205,676 | 208,366
Effective interest rate | 6.95% |
Debt Instrument, Maturity Date | Sep-30 |
Cira South Garage [Member] | Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 45,372 | 46,335
Effective interest rate | 7.11% |
Debt Instrument, Maturity Date | Sep-30 |
$345.0M 3.875% Guaranteed Exchangeable Notes due 2026 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 59,835 | 59,835
Effective interest rate | 5.50% |
Debt Instrument, Maturity Date | Oct-11 |
Bank Term Loan [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 183,000 | 183,000
Effective interest rate | LIBOR + 0.800% |
Debt Instrument, Maturity Date | Jun-12 |
Credit Facility [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 42,000 | 183,000
Effective interest rate | LIBOR + 0.725% |
Debt Instrument, Maturity Date | Jun-12 |
$300.0M 5.750% Guaranteed Notes due 2012 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 153,694 | 175,200
Effective interest rate | 5.73% |
Debt Instrument, Maturity Date | Apr-12 |
$250.0M 5.400% Guaranteed Notes due 2014 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 242,681 | 242,681
Effective interest rate | 5.53% |
Debt Instrument, Maturity Date | Nov-14 |
$250.0M 7.500% Guaranteed Notes due 2015 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 248,585 | 250,000
Effective interest rate | 7.77% |
Debt Instrument, Maturity Date | May-15 |
$250.0M 6.000% Guaranteed Notes due 2016 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 250,000 | 250,000
Effective interest rate | 5.95% |
Debt Instrument, Maturity Date | Apr-16 |
$300.0M 5.700% Guaranteed Notes due 2017 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 300,000 | 300,000
Effective interest rate | 5.68% |
Debt Instrument, Maturity Date | May-17 |
$325.0M 4.950% Guaranteed Notes due 2018 [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 325,000 | 0
Effective interest rate | 5.14% |
Debt Instrument, Maturity Date | Apr-18 |
Indenture IA (Preferred Trust I) [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 27,062 | 27,062
Effective interest rate | LIBOR + 1.25% |
Debt Instrument, Maturity Date | Mar-35 |
Indenture IB (Preferred Trust I) [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 25,774 | 25,774
Effective interest rate | LIBOR + 1.25% |
Debt Instrument, Maturity Date | Apr-35 |
Indenture II (Preferred Trust II) [Member] | Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 25,774 | 25,774
Effective interest rate | LIBOR + 1.25% |
Debt Instrument, Maturity Date | Jul-35 |
Secured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 590,043 | 712,246
Plus: unamortized fixed-rate debt premiums (discounts), net | (1,220) | (457)
Total mortgage indebtedness | 588,823 | 711,789
Unsecured Debt [Member] |  |
Consolidated debt obligations |  |
Long-term Debt, Gross | 1,883,405 | 1,722,326
Less: unamortized exchangeable debt discount | (362) | (906)
Less: unamortized fixed-rate debt discounts, net | (5,845) | (2,763)
Total unsecured indebtedness | 1,877,198 | 1,718,657
Total unsecured indebtedness | $ 2,466,021 | $ 2,430,446

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