Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2012
Basis of Presentation	*Basis of Presentation* The accompanying consolidated financial statements include the Company’s accounts and those of its consolidated subsidiaries. All significant intercompany amounts have been eliminated. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company’s most significant estimates include the fair value of financial instruments and loan loss reserve. Actual results could differ from those estimates. The Company currently operates in one business segment.
Classification of investment securities and valuations of financial instruments	*Classification of investment securities and valuations of financial instruments* The Company’s investments consist primarily of commercial mortgage loans, AAA-rated CMBS and other real estate related assets that are classified as either available-for-sale or held-to-maturity. The Company has also elected the fair value option for certain CMBS.
Classification of Loans	*Classification of Loans* Loans held-for-investment are stated at the principal amount outstanding, net of deferred loan fees and costs in accordance with GAAP.
Loan impairment	*Loan impairment* The Company’s loans are typically collateralized by commercial real estate. As a result, the Company regularly evaluates the extent and impact of any credit migration associated with the performance and/or value of the underlying collateral property as well as the financial and operating capability of the borrower/sponsor on a loan by loan basis. Specifically, a property’s operating results and any cash reserves are analyzed and used to assess (i) whether cash from operations are sufficient to cover the debt service requirements currently and into the future, (ii) the ability of the borrower to refinance the loan, and/or (iii) the property’s liquidation value. The Company also evaluates the financial wherewithal of any loan guarantors as well as the borrower’s competency in managing and operating the properties. In addition, the Company considers the overall economic environment, real estate sector, and geographic sub-market in which the borrower operates. Such impairment analyses are completed and reviewed by asset management and finance personnel, who utilize various data sources, including (i) periodic financial data such as debt service coverage ratio, property occupancy, tenant profile, rental rates, operating expenses, the borrower’s exit plan, and capitalization and discount rates, (ii) site inspections, and (iii) current credit spreads and discussions with market participants. For loans classified as held-for-investment, the Company evaluates the loans for possible impairment on a quarterly basis. Impairment occurs when it is deemed probable that the Company will not be able to collect all amounts due according to the contractual terms of the loan. Impairment is then measured based on the present value of expected future cash flows discounted at the loan’s effective rate or the fair value of the collateral, if the loan is collateral dependent. Upon measurement of impairment, the Company records an allowance to reduce the carrying value of the loan with a corresponding charge to net income. Significant judgments are required in determining impairment, including making assumptions regarding the value of the loan, the value of the underlying collateral and other provisions such as guarantees. The Company has determined that it is likely that it will receive contractual payments and a loan loss reserve was not necessary at December 31, 2012 and 2011.
Fair Value Election	*Fair Value Election* Securities at estimated fair value consist of AAA-rated CMBS which are pledged under the Company’s master repurchase agreement with Wells Fargo Bank, N.A. (“Wells Fargo”) (the “Wells Facility”). In accordance with GAAP, the Company elected the fair value option for these securities at the date of purchase, which permits the Company to measure these securities at fair value with the change in estimated fair value included as a component of earnings. Management believes that the election of the fair value option for this portion of the Company’s CMBS portfolio improves financial reporting by aligning the change in the estimated fair value of the securities and the related interest rate hedges without having to apply complex hedge accounting provisions.
Securities available-for-sale	*Securities available-for-sale* The Company has designated investments in certain mortgage-backed securities as available-for-sale because the Company may dispose of them prior to maturity and does not hold them principally for the purpose of selling them in the near term. Securities available-for-sale are carried at estimated fair value with the net unrealized gains or losses reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity. Unrealized losses on securities that reflect a decline in value that is judged by management to be other than temporary, if any, are charged to earnings. When the estimated fair value of a security is less than amortized cost, the Company considers whether there is an other-than-temporary impairment (“OTTI”) in the value of the security. An impairment is deemed an OTTI if (i) the Company intends to sell the security, (ii) it is more likely than not that the Company will be required to sell the security before recovering its cost basis, or (iii) the Company does not expect to recover the entire amortized cost basis of the security even if the Company does not intend to sell the security or believes it is more likely than not that the Company will be required to sell the security before recovering its cost basis. If the impairment is deemed to be an OTTI, the resulting accounting treatment depends on the factors causing the OTTI. If the OTTI has resulted from (i) the Company’s intention to sell the security, or (ii) its judgment that it is more likely than not that it will be required to sell the security before recovering its cost basis, an impairment loss is recognized in current earnings equal to the difference between its amortized cost basis and fair value. Whereas, if the OTTI has resulted from the Company’s conclusion that it will not recover its cost basis even if the Company does not intend to sell the security or believes it is more likely than not that the Company will be required to sell the security before recovering its cost basis, the credit loss portion of the impairment is recorded in current earnings and the portion of the loss related to other factors, such as changes in interest rates, continues to be recognized in accumulated other comprehensive income. Determining whether there is an OTTI may require management to exercise significant judgment and make significant assumptions, including, but not limited to, estimated cash flows, estimated prepayments, loss assumptions, and assumptions regarding changes in interest rates. As a result, actual impairment losses could differ from reported amounts. Such judgments and assumptions are based upon a number of factors, including (i) credit of the issuer or the borrower, (ii) credit rating of the security, (iii) key terms of the security, (iv) performance of the loan or underlying loans, including debt service coverage and loan-to-value ratios, (v) the value of the collateral for the loan or underlying loans, (vi) the effect of local, industry, and broader economic factors, and (vii) the historical and anticipated trends in defaults and loss severities for similar securities.
Interest income recognition	*Interest income recognition* Interest income on commercial mortgage loans is accrued based on the actual coupon rate and the outstanding principal balance adjusted for accretion of any purchase discounts, the amortization of any purchase premiums and the accretion of any deferred fees. Purchase premiums, purchase discounts and deferred fees are accreted into income using the effective yield method, adjusted for prepayments. Interest income on CMBS is accrued using the effective yield method, which includes the accretion of purchase discounts and the amortization of purchase premiums and the stated coupon interest payments.
Deferred Financing Costs	*Deferred Financing Costs* Costs incurred in connection with securitized financings are capitalized and amortized over the respective financing terms and are reflected on the accompanying consolidated statement of operations as a component of interest expense. At December 31, 2012 and 2011, respectively, the Company had approximately $678 and $2,044 of capitalized financing costs, net of amortization included in other assets on the consolidated balance sheets.
Earnings per share	*Earnings per share* GAAP requires use of the two-class method of computing earnings per share for all periods presented for each class of common stock and participating security as if all earnings for the period had been distributed. Under the two-class method, during periods of net income, the net income is first reduced for dividends declared on all classes of securities to arrive at undistributed earnings. During periods of net losses, the net loss is reduced for dividends declared on participating securities only if the security has the right to participate in the earnings of the entity and an objectively determinable contractual obligation to share in net losses of the entity. The remaining earnings are allocated to common stockholders and participating securities, to the extent that each security shares in earnings, as if all of the earnings for the period had been distributed. Each total is then divided by the applicable number of shares to arrive at basic earnings per share. For the diluted earnings, the denominator includes all outstanding common shares and all potential common shares assumed issued if they are dilutive. The numerator is adjusted for any changes in income or loss that would result from the assumed conversion of these potential common shares.
Hedging instruments and hedging activities	*Hedging instruments and hedging activities* Consistent with maintaining its status as a REIT, in the normal course of business, the Company may use a variety of derivative financial instruments to manage, or hedge, interest rate risk. Derivatives will be used for hedging purposes rather than speculation. The Company will determine their fair value and obtain quotations from a third party to facilitate the process in determining these fair values. If the Company’s hedging activities do not achieve the desired results, reported earnings may be adversely affected. GAAP requires an entity to recognize all derivatives as either assets or liabilities in the balance sheets and to measure those instruments at fair value. To the extent the instrument qualifies for hedge accounting, the fair value adjustments will be recorded as a component of other comprehensive income in stockholders’ equity until the hedged item is recognized in earnings. Should the Company choose not to pursue hedge accounting, the fair value adjustments will be recorded in earnings immediately. In order to mitigate interest rate risk resulting from the Company’s floating-rate borrowings under the Wells Facility, the Company entered into interest rate swaps and caps with an aggregate notional equal to the borrowings outstanding under the Wells Facility during 2010. The interest rate swaps are intended to hedge the floating-rate borrowings through the expected maturity of the underlying collateral and the interest rate caps are intended to hedge the floating-rate borrowings related to the potential extension of the underlying collateral. The Company chose not to pursue hedge accounting for these derivative instruments and will record the change in estimated fair value related to these interest rate agreements in earnings. The Company also elected to record the change in estimated fair value related to the AAA-rated CMBS securing the Wells Facility in earnings. This election allows the Company to align the change in the estimated fair value of the Wells Facility collateral and related interest rate hedges without having to apply complex hedge accounting provisions.
Repurchase agreements	*Repurchase agreements* Securities sold under repurchase agreements will be treated as collateralized financing transactions, unless they meet sales treatment. Securities financed through a repurchase agreement will remain on the Company’s consolidated balance sheet as an asset and cash received from the purchaser will be recorded on the Company’s consolidated balance sheet as a liability. Interest paid in accordance with repurchase agreements will be recorded in interest expense.
Share-based payments	*Share-based payments* The Company accounts for share-based compensation to its independent directors and to the Manager and to employees of the Manager and its affiliates using the fair value based methodology prescribed by GAAP. Compensation cost related to restricted common stock issued to the Company’s independent directors is measured at its estimated fair value at the grant date, and amortized into expense over the vesting period on a straight-line basis. Compensation cost related to restricted common stock issued to the Manager and to employees of the Manager and its affiliates will initially be measured at estimated fair value at the grant date, and remeasured on subsequent dates to the extent the awards are unvested. To amortize compensation expense for the restricted common stock granted to the Manager and to employees of the Manager and its affiliates, the Company uses the graded vesting attribution method.
Income taxes	*Income taxes* The Company has elected to be taxed as a REIT under Sections 856-860 of the Internal Revenue Code of 1986, as amended. Under those sections, a REIT which distributes at least 90% of its REIT taxable income, excluding net capital gains and determined without regard to the dividends paid deduction, as a dividend to its shareholders each year and which meets certain other conditions will not be taxed on that portion of its taxable income which is distributed to its shareholders. The Company has elected to treat certain consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries pursuant to an amendment to the Internal Revenue Code that became effective January 1, 2001. Taxable REIT subsidiaries may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to Federal and State income tax at regular corporate tax rates.
Underwriting costs	*Underwriting costs* Underwriting costs incurred in connection with the Company’s IPO are reflected as a reduction of additional paid-in-capital. See Note 13 – Commitments and Contingencies, for further discussion of the Company’s deferred underwriting fee.
Recent accounting pronouncements	*Recent accounting pronouncements* In July 2010, the Financial Accounting Standards Board (the “FASB”) issued an update to ASC 310, Receivables, by requiring more robust and disaggregated disclosures about the credit quality of the Company’s loans held for investment and if applicable, its allowance for credit losses. The objective of enhancing these disclosures is to improve financial statement users’ understanding of (1) the nature of a Company’s credit risk associated with its financing receivables and (2) the Company’s assessment of that risk in estimating its allowance for credit losses as well as changes in the allowance and the reasons for those changes. The adoption of this update to ASC 310 was effective for the Company as of December 31, 2010 and did not have a material effect on the Company’s financial statements. In January 2010, the FASB issued guidance on improving disclosures about fair value measurements. The guidance requires additional disclosure on transfers in and out of Levels I and II fair value measurements in the fair value hierarchy and the reasons for such transfers. In addition, for fair value measurements using significant unobservable inputs (Level III), the reconciliation of beginning and ending balances must be presented on a gross basis, with separate disclosure of gross purchases, sales, issuances, settlements and transfers in and transfers out of Level III. The new guidance also requires enhanced disclosures on the fair value hierarchy to disaggregate disclosures by each class of assets and liabilities. In addition, an entity is required to provide further disclosures on valuation techniques and inputs used to measure fair value for fair value measurements that fall in either Level II or Level III. Except for the Level III reconciliation disclosures, this guidance became effective for the Company beginning January 1, 2010. The Level III reconciliation disclosures are effective for fiscal years beginning after December 15, 2010. The adoption of this guidance did not have a material impact on the consolidated financial statements of the Company. In October 2011, the FASB issued a proposed ASU 2011-20, Financial Services-Investment Companies: Amendments to the Scope, Measurement, and Disclosure Requirements (“ASU 2011-20”), which would amend the criteria in ASC Topic 946 on Investment Companies (“ASC 946”) for determining whether an entity qualifies as an investment company. As proposed, ASU 2011-20 would affect the measurement, presentation and disclosure requirements for Investment Companies, as defined, amend the investment company definition in ASC 946, and remove the current exemption for real estate investment trusts from this topic. If the current exemption for real estate investments trusts is upheld, this proposal may result in a material modification to the presentation of the Company’s financial statements. The Company is monitoring developments related to this proposal and is evaluating the effects it would have on its financial statements. In December 2011, the FASB issued guidance requiring additional disclosure information about offsetting and related arrangements. Entities will be required to disclose both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. This scope would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements. The objective of this disclosure is to facilitate comparison between those entities that prepare their financial statements on a basis of GAAP and those entities that prepare their financial statements on the basis of International Financial Reporting Standards (“IFRS”). The guidance is effective for periods beginning on or after January 1, 2013, and interim periods within those annual periods. While the adoption of this guidance will impact the Company’s disclosure, the Company does not believe that the adoption of this guidance will have a significant effect on its consolidated financial statements. In September 2012, the FASB decided to remove the scope exception for mortgage REITs and require a mortgage REIT that meets the requirements to be an investment company under GAAP to follow investment company guidance. The FASB is currently in the process of redeliberations and will continue to consider feedback received on this Exposure Draft. The Company is currently evaluating the potential impact that the proposal would have on the Company’s consolidated financial statements. This exposure draft is not related to, nor does it impact the Company’s ability to remain excluded as an Investment Company under the 1940 Act. In January 2013, the FASB issued ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities (Topic 210), Balance Sheet. The update addresses implementation issues about ASU 2011-11 and applies to derivatives accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with ASC 210-20-45 or ASC 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. The guidance is effective January 1, 2013 and is to be applied retrospectively. This guidance does not amend when the Company currently offsets its derivative positions. As a result, the Company does not expect this guidance to have a material effect on its financial statements.