UNSECURED SENIOR NOTES	12 Months Ended
Dec. 31, 2014
UNSECURED SENIOR NOTES
UNSECURED SENIOR NOTES	6. UNSECURED SENIOR NOTES On December 17, 2013, the Operating Partnership issued $250 million in aggregate principal amount of 4.375% unsecured senior notes due December 15, 2023 (the “2023 Senior Notes”). On June 26, 2012, the Operating Partnership issued $250 million in aggregate principal amount of 4.80% unsecured senior notes due July 15, 2022 (the “2022 Senior Notes”). The 2023 Senior Notes along with the 2022 Senior Notes are collectively referred to as the “Senior Notes.” The indenture under which the Senior Notes were issued restricts the ability of the Operating Partnership and its subsidiaries to incur debt unless the Operating Partnership and its consolidated subsidiaries comply with a leverage ratio not to exceed 60% and an interest coverage ratio of more than 1.5:1 after giving effect to the incurrence of the debt. The indenture also restricts the ability of the Operating Partnership and its subsidiaries to incur secured debt unless the Operating Partnership and its consolidated subsidiaries comply with a secured debt leverage ratio not to exceed 40% after giving effect to the incurrence of the debt. The indenture also contains other financial and customary covenants, including a covenant not to own unencumbered assets with a value less than 150% of the unsecured indebtedness of the Operating Partnership and its consolidated subsidiaries. As of and for the year ended December 31, 2014, the Operating Partnership was in compliance with all of the financial covenants under the Senior Notes.

6. UNSECURED SENIOR NOTES

On December 17, 2013, the Operating Partnership issued $250 million in aggregate principal amount of 4.375% unsecured senior notes due December 15, 2023 (the “2023 Senior Notes”). On June 26, 2012, the Operating Partnership issued $250 million in aggregate principal amount of 4.80% unsecured senior notes due July 15, 2022 (the “2022 Senior Notes”). The 2023 Senior Notes along with the 2022 Senior Notes are collectively referred to as the “Senior Notes.” The indenture under which the Senior Notes were issued restricts the ability of the Operating Partnership and its subsidiaries to incur debt unless the Operating Partnership and its consolidated subsidiaries comply with a leverage ratio not to exceed 60% and an interest coverage ratio of more than 1.5:1 after giving effect to the incurrence of the debt. The indenture also restricts the ability of the Operating Partnership and its subsidiaries to incur secured debt unless the Operating Partnership and its consolidated subsidiaries comply with a secured debt leverage ratio not to exceed 40% after giving effect to the incurrence of the debt. The indenture also contains other financial and customary covenants, including a covenant not to own unencumbered assets with a value less than 150% of the unsecured indebtedness of the Operating Partnership and its consolidated subsidiaries. As of and for the year ended December 31, 2014, the Operating Partnership was in compliance with all of the financial covenants under the Senior Notes.