The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at March 31, 2017 and December 31, 2016 (in thousands):

	March 31, 2017			December 31, 2016			Effective Interest Rate				Maturity Date
MORTGAGE DEBT:

Two Logan Square	$	85,625		$	86,012			3.98	%		May 2020
One Commerce Square		126,198			127,026			3.64	%	(a)	Apr 2023
Two Commerce Square		112,000			112,000			4.51	%	(b)	Apr 2023
Principal balance outstanding		323,823			325,038
Plus: fair market value premium (discount), net		(2,652	)		(2,761	)
Less: deferred financing costs		(687	)		(728	)
Mortgage indebtedness	$	320,484		$	321,549

UNSECURED DEBT
Seven-Year Term Loan - Swapped to fixed	$	250,000		$	250,000			3.72	%		Oct 2022
$300.0M 5.70% Guaranteed Notes due 2017		300,000			300,000			5.68	%		May 2017
$325.0M 4.95% Guaranteed Notes due 2018		325,000			325,000			5.13	%		Apr 2018
$250.0M 3.95% Guaranteed Notes due 2023		250,000			250,000			4.02	%		Feb 2023
$250.0M 4.10% Guaranteed Notes due 2024		250,000			250,000			4.33	%		Oct 2024
$250.0M 4.55% Guaranteed Notes due 2029		250,000			250,000			4.60	%		Oct 2029
Indenture IA (Preferred Trust I)		27,062			27,062			2.75	%		Mar 2035
Indenture IB (Preferred Trust I)		25,774			25,774			3.30	%		Apr 2035
Indenture II (Preferred Trust II)		25,774			25,774			3.09	%		Jul 2035
Principal balance outstanding		1,703,610			1,703,610
Plus: original issue premium (discount), net		(4,424	)		(4,678	)
Less: deferred financing costs		(6,999	)		(7,369	)
Total unsecured indebtedness	$	1,692,187		$	1,691,563
Total Debt Obligations	$	2,012,671		$	2,013,112

(a)

This loan was assumed upon acquisition of the related properties on December 19, 2013. On December 29, 2015, the Company refinanced the debt increasing the principal balance to $130.0 million and extended the term of the scheduled maturity from January 6, 2016 to April 5, 2023. The effective interest rate as of December 31, 2015 was 3.64%. A default under this loan will also constitute a default under the loan outstanding on Two Commerce Square. This loan is also secured by a lien on Two Commerce Square.

(b)

This loan was assumed upon acquisition of the related property on December 19, 2013. The interest rate reflects the market rate at the time of acquisition. A default under this loan will also constitute a default under the loan outstanding on One Commerce Square. This loan is also secured by a lien on One Commerce Square.