v3.3.1.900

Secured and Unsecured Debt of the Operating Partnership Secured and Unsecured Debt of the Operating Partnership - Secured Debt (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) loans | Jun. 30, 2015 USD ($) | Dec. 31, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |
Unsecured Debt |  | $ 1,856,590 |  | $ 1,783,121
Secured Debt |  |  |  |
Debt premium |  |  | $ 6,200 |
Principal amount |  |  |  | 172,500
Secured debt (Notes 3, 6, 7 and 16) |  | 381,918 |  | 546,292
Secured Debt [Member] |  |  |  |
Secured Debt |  |  |  |
Debt premium |  | 6,200 |  |
Unamortized discount (premium), Net |  |  |  | (10,300)
Kilroy Realty, L.P. [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured Debt |  | 1,856,590 |  | 1,783,121
Secured Debt |  |  |  |
Secured debt (Notes 3, 6, 7 and 16) |  | 381,918 |  | 546,292
Kilroy Realty, L.P. [Member] | Secured Debt [Member] |  |  |  |
Secured Debt |  |  |  |
Net book value of properties pledged as collateral for secured debt |  | $ 600,000 |  |
Number of secured loans with restrictions | loans |  | 5 |  |
Number of secured debt | loans |  | 6 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1] | $ 381,918 |  | 546,292
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 4.27% Mortgage Payable due Feb 1, 2018 [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 4.27% |  |
Effective interest rate | [2],[3] | 4.27% |  |
Maturity date |  | Feb. 01, 2018 |  |
Secured debt (Notes 3, 6, 7 and 16) |  | $ 128,315 |  | 130,767
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 4.48% Mortgage Payable due July 2027 |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 4.48% |  |
Effective interest rate | [2],[3] | 4.48% |  |
Maturity date |  | Jul. 01, 2027 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1],[4] | $ 96,354 |  | 97,000
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 6.05% Mortgage Payable Due June 1, 2019 [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 6.05% |  |
Effective interest rate | [2],[3] | 3.50% |  |
Maturity date |  | Jun. 01, 2019 |  |
Debt premium |  | $ 6,200 |  | 8,000
Secured debt (Notes 3, 6, 7 and 16) | [1],[4],[5] | $ 85,890 |  | 89,242
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 6.51% Mortgage Payable due February 1, 2017 [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 6.51% |  |
Effective interest rate | [2],[3] | 6.51% |  |
Maturity date |  | Feb. 01, 2017 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1] | $ 65,563 |  | 66,647
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 5.23% Mortgage Payable due January 2016 [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 5.23% |  |
Effective interest rate | [2],[3] | 3.50% |  |
Maturity date |  | Jan. 01, 2016 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1],[6] | $ 0 |  | 52,793
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 5.57% Mortgage Note Payable due February 2016 [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 5.57% |  |
Effective interest rate | [2],[3] | 3.25% |  |
Maturity date |  | Feb. 11, 2016 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1],[6] | $ 0 |  | 40,258
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 5.09% Mortgage Payable due August 2015 [Member] [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 5.09% |  |
Effective interest rate | [2],[3] | 3.50% |  |
Maturity date |  | Aug. 07, 2015 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1] | $ 0 |  | 34,311
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | Four Point Nine four Percent Mortgage Payable due April Fifteen Two Thousand Fifteen [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 4.94% |  |
Effective interest rate | [2],[3] | 4.00% |  |
Maturity date |  | Apr. 15, 2015 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1] | $ 0 |  | 26,285
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | 7.15% Mortgage Payable due May 1, 2017 [Member] |  |  |  |
Secured Debt |  |  |  |
Stated interest rate | [2] | 7.15% |  |
Effective interest rate | [2],[3] | 7.15% |  |
Maturity date |  | May 01, 2017 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1] | $ 3,987 |  | 6,568
Kilroy Realty, L.P. [Member] | Secured Debt [Member] | Other [Member] |  |  |  |
Secured Debt |  |  |  |
Secured debt (Notes 3, 6, 7 and 16) |  | 600 |  |
Secured debt (Notes 3, 6, 7 and 16) | [1],[7] | 1,809 |  | $ 2,421
Secured Debt [Member] |  |  |  |
Secured Debt |  |  |  |
Secured debt (Notes 3, 6, 7 and 16) |  | $ 561 |  |
[1] | Amounts reported include the amounts of unamortized debt premiums of $6.2 million and $10.3 million as of December 31, 2015 and 2014, respectively.
[2] | All interest rates presented are fixed-rate interest rates.
[3] | This represents the rate at which interest expense is recorded for financial reporting purposes, which reflects the amortization of discounts/premiums, excluding debt issuance costs.
[4] | The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.
[5] | In January 2013, in connection with the acquisition of two office buildings in Seattle, Washington, we assumed a mortgage loan that is secured by the project. The loan requires monthly principal and interest payments based on a 6.4 year amortization period. As of December 31, 2015 and 2014, the mortgage loan had unamortized debt premiums of $6.2 million and $8.0 million, respectively.
[6] | These mortgage notes payable were repaid during the year ended December 31, 2015 at par.
[7] | Excludes $0.6 million of secured debt related to real estate assets held for sale as of December 31, 2015.

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