6. Unsecured Senior Notes

The following summarizes the unsecured senior notes outstanding as of September 30, 2012 (dollars in thousands):


	Coupon/ Stated Rate			Effective Rate (1)			Principal Amount			Maturity Date (2)
12 Year Unsecured Senior Notes		5.625	%		5.693	%	$	300,000		April 15, 2015
12 Year Unsecured Senior Notes		5.000	%		5.194	%		250,000		June 1, 2015
10 Year Unsecured Senior Notes		5.875	%		5.967	%		700,000		October 15, 2019
10 Year Unsecured Senior Notes		5.625	%		5.708	%		700,000		November 15, 2020
10 Year Unsecured Senior Notes		4.125	%		4.289	%		850,000		May 15, 2021
7 Year Unsecured Senior Notes		3.700	%		3.853	%		850,000		November 15, 2018
11 Year Unsecured Senior Notes		3.850	%		3.954	%		1,000,000		February 1, 2023

Total principal								4,650,000
Net unamortized discount								(10,783	)

Total							$	4,639,217

(1)	Yield on issuance date including the effects of discounts on the notes.

(2)	No principal amounts are due prior to maturity.

On June 11, 2012, the Company’s Operating Partnership completed a public offering of $1.0 billion in aggregate principal amount of its 3.850% senior unsecured notes due 2023. The notes were priced at 99.779% of the principal amount to yield an effective rate (including financing fees) of 3.954% to maturity. The notes will mature on February 1, 2023, unless earlier redeemed. The aggregate net proceeds from the offering were approximately $989.4 million after deducting underwriting discounts and transaction expenses.

On August 24, 2012, the Company’s Operating Partnership used available cash to redeem the remaining $225.0 million in aggregate principal amount of its 6.25% senior notes due 2013. The redemption price was determined in accordance with the applicable indenture and totaled approximately $231.6 million. The redemption price included approximately $1.5 million of accrued and unpaid interest to, but not including, the redemption date. Excluding such accrued and unpaid interest, the redemption price was approximately 102.25% of the principal amount being redeemed. The Company recognized a loss on early extinguishment of debt totaling approximately $5.2 million, which amount included the payment of the redemption premium totaling approximately $5.1 million.

The indenture relating to the unsecured senior notes contains certain financial restrictions and requirements, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 50%, (3) an interest coverage ratio of greater than 1.50, and (4) an unencumbered asset value of not less than 150% of unsecured debt. At September 30, 2012, the Company was in compliance with each of these financial restrictions and requirements.