Income Taxes	12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	12. INCOME TAXES We made an election to be taxed as a REIT, effective January 1, 2003, under the Internal Revenue Code, for U.S. federal income tax purposes. We generally must distribute annually at least 90% of our net taxable income, subject to certain adjustments and excluding any net capital gain, in order for U.S. federal income tax not to apply to our earnings that we distribute. To the extent that we satisfy this distribution requirement, but distribute less than 100% of our net taxable income, we will be subject to U.S. federal income tax on our undistributed taxable income. In addition, we will be subject to a 4% nondeductible excise tax if the actual amount that we pay out to our stockholders in a calendar year is less than a minimum amount specified under U.S. federal tax laws. Our qualification as a REIT also depends on our ability to meet various other requirements imposed by the Internal Revenue Code, which relate to organizational structure, diversity of stock ownership and certain restrictions with regard to the nature of our assets and the sources of our income. Even if we qualify as a REIT, we may be subject to certain U.S. federal excise taxes and state and local taxes on our income and assets. If we fail to qualify as a REIT in any taxable year, we will be subject to U.S. federal income taxes at regular corporate rates (including any applicable alternative minimum tax) and will not be able to qualify as a REIT for the subsequent four full taxable years. During the years ended December 31, 2014, 2013, and 2012, we recorded a current income tax provision of $518,000, $995,000, and $174,000, respectively, primarily related to activities of our taxable REIT subsidiaries and various state and local taxes. We did not have any deferred tax assets or liabilities as of December 31, 2014 or 2013. As a result of our issuance of 25,875,000 shares of class A common stock in May 2013, the availability of our net operating losses, or NOLs, and net capital losses, or NCLs, is generally limited to $2.0 million per annum by change of control provisions promulgated by the Internal Revenue Service with respect to the ownership of Blackstone Mortgage Trust. As of December 31, 2014, we had estimated NOLs of $159.0 million and NCLs of $32.0 million available to be carried forward and utilized in current or future periods. To the extent we are unable to utilize our NOLs, they will expire in 2029. To the extent we are unable to utilize our NCLs, $31.4 million will expire in 2015, and $602,000 will expire in 2017. As of December 31, 2014, tax years 2011 through 2014 remain subject to examination by taxing authorities.

12. INCOME TAXES

We made an election to be taxed as a REIT, effective January 1, 2003, under the Internal Revenue Code, for U.S. federal income tax purposes. We generally must distribute annually at least 90% of our net taxable income, subject to certain adjustments and excluding any net capital gain, in order for U.S. federal income tax not to apply to our earnings that we distribute. To the extent that we satisfy this distribution requirement, but distribute less than 100% of our net taxable income, we will be subject to U.S. federal income tax on our undistributed taxable income. In addition, we will be subject to a 4% nondeductible excise tax if the actual amount that we pay out to our stockholders in a calendar year is less than a minimum amount specified under U.S. federal tax laws.

Our qualification as a REIT also depends on our ability to meet various other requirements imposed by the Internal Revenue Code, which relate to organizational structure, diversity of stock ownership and certain restrictions with regard to the nature of our assets and the sources of our income. Even if we qualify as a REIT, we may be subject to certain U.S. federal excise taxes and state and local taxes on our income and assets. If we fail to qualify as a REIT in any taxable year, we will be subject to U.S. federal income taxes at regular corporate rates (including any applicable alternative minimum tax) and will not be able to qualify as a REIT for the subsequent four full taxable years.

During the years ended December 31, 2014, 2013, and 2012, we recorded a current income tax provision of $518,000, $995,000, and $174,000, respectively, primarily related to activities of our taxable REIT subsidiaries and various state and local taxes. We did not have any deferred tax assets or liabilities as of December 31, 2014 or 2013.

As a result of our issuance of 25,875,000 shares of class A common stock in May 2013, the availability of our net operating losses, or NOLs, and net capital losses, or NCLs, is generally limited to $2.0 million per annum by change of control provisions promulgated by the Internal Revenue Service with respect to the ownership of Blackstone Mortgage Trust. As of December 31, 2014, we had estimated NOLs of $159.0 million and NCLs of $32.0 million available to be carried forward and utilized in current or future periods. To the extent we are unable to utilize our NOLs, they will expire in 2029. To the extent we are unable to utilize our NCLs, $31.4 million will expire in 2015, and $602,000 will expire in 2017.

As of December 31, 2014, tax years 2011 through 2014 remain subject to examination by taxing authorities.