A summary of outstanding indebtedness of the Operating Partnership as of December 31, 2016 and 2015 is as follows (in thousands):



Indebtedness	Interest Rate at December 31, 2016		Maturity Date		Principal Outstanding December 31, 2016				Principal Outstanding December 31, 2015
Global revolving credit facility	Various	⁽¹⁾	Jan 15, 2020	⁽¹⁾	$	210,077		⁽²⁾	$	967,884		⁽²⁾
Deferred financing costs, net					(10,868		)		(7,613		)
Global revolving credit facility, net					199,209				960,271
Unsecured Term Loan
Unsecured term loan — 5-year	Various	⁽³⁾⁽⁴⁾	Jan 15, 2021		1,188,498			⁽⁵⁾	924,568			⁽⁵⁾
Unsecured term loan — 7-year	Various	⁽³⁾⁽⁴⁾	Jan 15, 2023		300,000			⁽⁵⁾	—
Deferred financing costs, net					(6,137		)		(1,301		)
Unsecured term loan, net					1,482,361				923,267
Unsecured senior notes:
Prudential Shelf Facility:
Series C	9.680%		Jan 6, 2016		—				25,000
Series E	5.730%		Jan 20, 2017	⁽⁶⁾	50,000				50,000
Total Prudential Shelf Facility					50,000				75,000
Senior Notes:
5.875% notes due 2020	5.875%		Feb 1, 2020		500,000				500,000
3.400% notes due 2020	3.400%		Oct 1, 2020		500,000				500,000
5.250% notes due 2021	5.250%		Mar 15, 2021		400,000				400,000
3.950% notes due 2022	3.950%		Jul 1, 2022		500,000				500,000
3.625% notes due 2022	3.625%		Oct 1, 2022		300,000				300,000
4.750% notes due 2023	4.750%		Oct 13, 2023		370,200			⁽⁷⁾	442,080			⁽⁷⁾
2.625% notes due 2024	2.625%		Apr 15, 2024		631,020			⁽⁸⁾	—
4.250% notes due 2025	4.250%		Jan 17, 2025		493,600			⁽⁷⁾	589,440			⁽⁷⁾
4.750% notes due 2025	4.750%		Oct 1, 2025		450,000				450,000
Unamortized discounts					(15,649		)		(17,914		)
Total senior notes, net of discount					4,129,171				3,663,606
Deferred financing costs, net					(25,374		)		(26,037		)
Total unsecured senior notes, net of discount and deferred financing costs					4,153,797				3,712,569

Mortgage loans:
2045 & 2055 Lafayette Street	5.93%		Feb 6, 2017		—				61,437
34551 Ardenwood Boulevard 1-4	5.95%		Nov 11, 2016		—				50,477
1100 Space Park Drive	5.89%		Dec 11, 2016		—				50,423
600 West Seventh Street	5.80%		Mar 15, 2016		—				46,000
150 South First Street	6.30%		Feb 6, 2017		—				48,484
2334 Lundy Place	5.96%		Nov 11, 2016		—				36,714
8025 North Interstate 35	4.09%		Mar 6, 2016		—				5,789
731 East Trade Street	8.22%		Jul 1, 2020		2,916				3,420
Unamortized net premiums					334				439
Total mortgage loans, including premiums					3,250				303,183
Deferred financing costs, net					(10		)		(253		)
Total mortgage loans, including premiums and net of deferred financing costs					3,240				302,930
Total indebtedness					$	5,838,607			$	5,899,037

(1)

The interest rate for borrowings under the 2016 global revolving credit facility equals the applicable index plus a margin of 100 basis points, which is based on the current credit ratings of our long-term debt. An annual facility fee of 20 basis points, which is based on the current credit ratings of our long-term debt, is due and payable quarterly on the total commitment amount of the facility. Two six-month extensions are available, which we may exercise if certain conditions are met.


(2)	Balances as of December 31, 2016 and December 31, 2015 are as follows (balances, in thousands):



Denomination of Draw	Balance as of December 31, 2016			Weighted-average interest rate		Balance as of December 31, 2015			Weighted-average interest rate
Floating Rate Borrowing (a)
U.S. dollar ($)	$	105,000		1.67	%	$	274,000		1.46	%
British pound sterling (£)	11,106		(b)	1.25	%	95,784		(d)	1.61	%
Euro (€)	15,250		(b)	0.63	%	280,565		(d)	0.90	%
Australian dollar (AUD)	—			—	%	96,831		(d)	3.16	%
Hong Kong dollar (HKD)	1,728		(b)	1.66	%	86,082		(d)	1.33	%
Japanese yen (JPY)	54,273		(b)	0.92	%	14,304		(d)	1.15	%
Singapore dollar (SGD)	11,186		(b)	1.52	%	49,132		(d)	1.92	%
Canadian dollar (CAD)	11,534		(b)	1.92	%	71,186		(d)	1.95	%
Total	$	210,077		1.39	%	$	967,884		1.53	%


(a)	The interest rates for floating rate borrowings under the global revolving credit facility currently equal the applicable index plus a margin of 100 basis points, which is based on the credit rating of our long-term debt.


(b)	Based on exchange rates of $1.23 to £1.00, $1.05 to €1.00, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.69 to 1.00 SGD and $0.74 to 1.00 CAD, respectively, as of December 31, 2016.


(c)	Based on exchange rates $1.47 to £1.00, of $1.09 to €1.00, $0.73 to 1.00 AUD, $0.13 to 1.00 HKD, $0.01 to 1.00 JPY, $0.70 to 1.00 SGD and $0.72 to 1.00 CAD, respectively, as of December 31, 2015.


(3)	Interest rates are based on our current senior unsecured debt ratings and are 110 basis points and 155 basis points over the applicable index for floating rate advances for the 5-Year Term Loan and the 7-Year Term Loan, respectively.


(4)	We have entered into interest rate swap agreements as a cash flow hedge for interest generated by the U.S. dollar, Singapore dollar, British pound sterling and Canadian dollar tranches of the unsecured term loan. See Note 14 "Derivative Instruments" for further information.


(5)	Balances as of December 31, 2016 and December 31, 2015 are as follows (balances, in thousands):



Denomination of Draw	Balance as of December 31, 2016			Weighted-average interest rate			Balance as of December 31, 2015			Weighted-average interest rate
U.S. dollar ($)	$	710,911		1.99	%	(b)	$	410,905		1.51	%	(d)
British pound sterling (£)	209,132		(a)	1.36	%	(b)	178,195		(c)	1.78	%	(d)
Singapore dollar (SGD)	222,824		(a)	1.76	%	(b)	161,070		(c)	2.16	%
Australian dollar (AUD)	170,325		(a)	2.72	%		75,337		(c)	3.27	%
Hong Kong dollar (HKD)	86,029		(a)	1.77	%		—			—	%
Canadian dollar (CAD)	73,294		(a)	2.00	%	(b)	—			—	%
Euro (€)	—			—	%		99,061		(c)	1.00	%
Japanese yen (JPY)	15,983		(a)	0.98	%		—			—	%
Total	$	1,488,498		1.93	%	(b)	$	924,568		1.76	%	(d)


(a)	Based on exchange rates of $0.69 to 1.00 SGD, $1.23 to £1.00, $0.72 to 1.00 AUD, $0.13 to 1.00 HKD, $0.74 to 1.00 CAD and $0.01 to 1.00 JPY, respectively, as of December 31, 2016.


(b)	As of December 31, 2016, the weighted-average interest rate reflecting interest rate swaps was 2.45% (U.S. dollar), 1.89% (British pound sterling), 1.90% (Singapore dollar), 1.88% (Canadian dollar) and 2.23% (Total). See Note 14 for further discussion on interest rate swaps.


(c)	Based on exchange rates of $0.70 to 1.00 SGD, $1.47 to £1.00, $1.09 to €1.00 and $0.73 to 1.00 AUD, respectively, as of December 31, 2015.


(d)	As of December 31, 2015, the weighted-average interest rate reflecting interest rate swaps was 1.90% (U.S. dollar), 2.19% (Singapore dollar) and 1.94% (Total). See Note 14 for further discussion on interest rate swaps.


(6)	On January 20, 2017, the Company paid this unsecured note in full at maturity.


(7)	Based on exchange rates of $1.23 to £1.00 as of December 31, 2016 and $1.47 to £1.00 as of December 31, 2015.


(8)	Based on exchange rate of $1.05 to €1.00 as of December 31, 2016.