Indebtedness (Tables)

12 Months Ended

Dec. 31, 2013

Indebtedness

Schedule of outstanding indebtedness

	December 31,
	2013		2012
Unsecured revolving credit facility, due October 2015, at LIBOR plus a premium	$	235,000	$	297,000
Unsecured revolving credit facility, due March 2016, at LIBOR plus a premium(1)		—		95,000
Unsecured term loan, due December 2016, at LIBOR plus a premium		500,000		500,000
Unsecured term loan, due July 2017, at LIBOR plus a premium(1)		—		350,000
Senior Notes, due 2014 at 5.75%		—		244,655
Senior Notes, due 2015 at 6.40%		33,440		186,000
Senior Notes, due 2015 at 5.75%		138,773		250,000
Senior Notes, due 2016 at 6.25%		139,104		400,000
Senior Notes, due 2017 at 6.25%		250,000		250,000
Senior Notes, due 2018 at 6.65%		250,000		250,000
Senior Notes, due 2019 at 7.50%		125,000		125,000
Senior Notes, due 2020 at 5.875%		250,000		250,000
Senior Notes, due 2042 at 5.75%		175,000		175,000
Mortgage Notes Payable, due 2014 at 4.95%		12,040		12,356
Mortgage Notes Payable, due 2015 at 5.99%		7,987		8,272
Mortgage Notes Payable, due 2015 at 5.78%(2)		—		8,980
Mortgage Notes Payable, due 2016 at 5.235%		116,000		116,000
Mortgage Notes Payable, due 2016 at 5.689%(1)		—		7,500
Mortgage Notes Payable, due 2016 at 5.76%		—		7,474
Mortgage Notes Payable, due 2016 at 6.03%		40,334		40,854
Mortgage Notes Payable, due 2016 at 6.29%		144,522		146,264
Mortgage Notes Payable, due 2016 at 7.36%		10,804		11,302
Mortgage Notes Payable, due 2017 at 5.67%		41,275		41,275
Mortgage Notes Payable, due 2017 at 5.68%		265,000		265,000
Mortgage Notes Payable, due 2017 at 5.95%(1)		—		18,447
Mortgage Notes Payable, due 2019 at LIBOR plus a premium(3)		173,247		174,870
Mortgage Notes Payable, due 2021 at 5.69%		28,391		28,793
Mortgage Notes Payable, due 2021 at 5.30%		39,598		40,185
Mortgage Notes Payable, due 2022 at 6.75%		3,456		3,759
Mortgage Notes Payable, due 2023 at 6.14%(2)		—		12,650
Mortgage Notes Payable, due 2026 at 5.71%		7,240		7,637
		2,986,211		4,324,273
Unamortized net premiums and discounts		19,199		25,548
	$	3,005,410	$	4,349,821

⁽¹⁾

Represents indebtedness of SIR when SIR was a consolidated subsidiary of ours.

⁽²⁾

These mortgage notes are included in liabilities related to properties held for sale at December 31, 2013. See Note 4 for additional information regarding our properties held for sale.

⁽³⁾

Interest on this loan is payable at a spread over LIBOR but has been fixed for the first seven years to December 1, 2016 by a cash flow hedge which sets the rate at approximately 5.66%.

Summary of outstanding senior notes purchased for cash pursuant to a tender offer

Senior Note	Principal		Purchase Price
5.75% Senior Notes due February 15, 2014	$	145,612	$	148,746
6.40% Senior Notes due February 15, 2015		152,560		164,140
5.75% Senior Notes due November 1, 2015		111,227		121,047
6.25% Senior Notes due August 15, 2016		260,896		292,218
	$	670,295	$	726,151

Schedule of required principal payments on outstanding debt

The required principal payments due during the next five years and thereafter under all of our outstanding debt at December 31, 2013, excluding principal payments totaling $20,402 for mortgage debt related to properties classified as held for sale, are as follows:

2014	$	18,826
2015		421,821
2016		948,708
2017		560,592
2018		254,614
Thereafter		781,650
	$	2,986,211