Debt Obligations Debt Obligations (Tables)

3 Months Ended

Mar. 31, 2013

Debt Disclosure [Abstract]

Consolidated Debt Obligations [Table Text Block]

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at March 31, 2013 and December 31, 2012 (in thousands):

Property / Location	March 31, 2013			December 31, 2012			Effective Interest Rate			Maturity Date
MORTGAGE DEBT:
Tysons Corner	92,732			93,188			5.36	%	(a)	Aug-15
Two Logan Square	89,133			89,340			7.57	%		Apr-16
Fairview Eleven Tower	21,939			22,000			4.25	%		Jan-17
IRS Philadelphia Campus	195,608			197,111			7.00	%		Sep-30
Cira South Garage	41,765			42,303			7.12	%		Sep-30
Principal balance outstanding	441,177			443,942
Plus: fair market value premiums (discounts), net	(877		)	(968		)
Total mortgage indebtedness	$	440,300		$	442,974
UNSECURED DEBT:
Credit Facility	—			69,000			LIBOR + 1.50%			Feb-16
Three-Year Term Loan - Swapped to fixed	150,000			150,000			2.60	%		Feb-15
Four-Year Term Loan - Variable	100,000			100,000			LIBOR + 1.75%			Feb-16
Seven-Year Term Loan - Swapped to fixed	200,000			200,000			3.62	%		Feb-19
$250.0M 5.400% Guaranteed Notes due 2014	238,379			238,379			5.53	%		Nov-14
$250.0M 7.500% Guaranteed Notes due 2015	166,535			166,535			7.76	%		May-15
$250.0M 6.000% Guaranteed Notes due 2016	150,429			150,429			5.95	%		Apr-16
$300.0M 5.700% Guaranteed Notes due 2017	300,000			300,000			5.68	%		May-17
$325.0M 4.950% Guaranteed Notes due 2018	325,000			325,000			5.13	%		Apr-18
$250.0M 3.950% Guaranteed Notes due 2023	250,000			250,000			4.02	%		Feb-23
Indenture IA (Preferred Trust I)	27,062			27,062			2.75	%		Mar-35
Indenture IB (Preferred Trust I)	25,774			25,774			3.30	%		Apr-35
Indenture II (Preferred Trust II)	25,774			25,774			3.09	%		Jul-35
Principal balance outstanding	1,958,953			2,027,953
plus: original issue premium (discount), net	(5,321		)	(5,597		)
Total unsecured indebtedness	$	1,953,632		$	2,022,356
Total Debt Obligations	$	2,393,932		$	2,465,330

Summary Of Debt Repurchases [Table Text Block]

Schedule of Extinguishment of Debt [Table Text Block]

As of March 31, 2013, the Company’s aggregate scheduled principal payments on debt obligations, excluding amortization of discounts and premiums, were as follows (in thousands):

2013	$	8,473
2014	250,321
2015	416,568
2016	347,038
2017	330,323
Thereafter	1,047,407
Total principal payments	2,400,130
Net unamortized premiums/(discounts)	(6,198		)
Outstanding indebtedness	$	2,393,932