Pacific Oak Strategic Opportunity REIT (PCOK) 10-Q 14 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 04, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	KBS Strategic Opportunity REIT, Inc.
Entity Central Index Key	1,452,936
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		57,039,883

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Real estate held for investment, net	$ 1,109,425	$ 822,514
Real estate loan receivable, net	0	27,850
Total real estate and real estate-related investments, net	1,109,425	850,364
Cash and cash equivalents	41,596	23,058
Restricted cash	21,436	5,807
Investments in unconsolidated joint ventures	76,118	74,437
Rents and other receivables, net	28,228	24,487
Above-market leases, net	733	1,038
Prepaid expenses and other assets	28,554	25,023
Total assets	1,306,090	1,004,214
Liabilities and equity
Notes and bonds payable, net	936,332	547,323
Accounts payable and accrued liabilities	22,768	17,543
Due to affiliate	51	59
Below-market leases, net	7,606	2,735
Other liabilities	14,596	17,905
Total liabilities	981,353	585,565
Commitments and contingencies (Note 13)
Redeemable common stock	16,639	9,859
Equity
Preferred stock, $.01 par value; 10,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $.01 par value; 1,000,000,000 shares authorized, 57,050,299 and 58,696,115 shares issued and outstanding as of September 30, 2016 and December 31, 2015, respectively	571	587
Additional paid-in capital	455,378	504,303
Cumulative distributions and net losses	(149,799)	(111,527)
Total KBS Strategic Opportunity REIT, Inc. stockholders’ equity	306,150	393,363
Noncontrolling interests	1,948	15,427
Total equity	308,098	408,790
Total Liabilities and Equity	$ 1,306,090	$ 1,004,214

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	57,050,299	58,696,115
Common stock, shares outstanding	57,050,299	58,696,115

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Rental income	$ 29,229	$ 22,337	$ 76,646	$ 66,315
Tenant reimbursements	5,902	4,940	15,484	13,991
Interest income from real estate loan receivable	0	0	3,655	1,968
Other operating income	1,002	881	2,580	2,495
Total revenues	36,133	28,158	98,365	84,769
Expenses:
Operating, maintenance, and management	10,932	9,930	29,755	27,855
Real estate taxes and insurance	4,516	3,940	12,419	11,439
Asset management fees to affiliate	2,639	2,112	6,932	6,242
Real estate acquisition fees to affiliate	1,690	0	2,964	0
Real estate acquisition fees and expenses	274	0	542	0
General and administrative expenses	1,337	892	4,172	2,624
Foreign currency transaction loss, net	6,639	0	4,602	0
Depreciation and amortization	14,337	11,297	37,436	33,684
Interest expense	7,992	3,524	20,354	11,292
Total expenses	50,356	31,695	119,176	93,136
Other income (loss):
Other interest income	7	7	22	21
Other income	0	195	0	5,084
Equity in (loss) income of unconsolidated joint venture	(791)	150	(1,139)	(186)
Gain on sale of real estate, net	0	2,908	0	11,195
Total other (loss) income	(784)	3,260	(1,117)	16,114
Net (loss) income	(15,007)	(277)	(21,928)	7,747
Net loss (income) attributable to noncontrolling interests	56	(185)	124	(4,448)
Net (loss) income attributable to common stockholders	$ (14,951)	$ (462)	$ (21,804)	$ 3,299
Net (loss) income per common share, basic and diluted (in dollars per share)	$ (0.25)	$ (0.01)	$ (0.37)	$ 0.05
Weighted-average number of common shares outstanding, basic and diluted (in shares)	58,642,752	59,729,415	58,676,546	59,986,122

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Stockholders' Equity [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Cumulative Distributions and Net Losses [Member]	Noncontrolling Interests [Member]
Balance, shares at Dec. 31, 2014			60,044,329
Balance, value at Dec. 31, 2014	$ 450,136	$ 433,398	$ 600	$ 524,489	$ (91,691)	$ 16,738
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	7,132	2,444			2,444	4,688
Issuance of common stock, shares			1,114,532
Issuance of common stock, value	13,573	13,573	$ 11	13,562
Transfers to redeemable common stock	(3,663)	(3,663)		(3,663)
Redemptions of common stock, shares			(2,462,746)
Redemptions of common stock, value	(30,100)	(30,100)	$ (24)	(30,076)
Distributions declared	(22,280)	(22,280)			(22,280)
Other offering costs	(9)	(9)		(9)
Noncontrolling interests contributions	1,343					1,343
Distributions to noncontrolling interests	$ (7,342)					(7,342)
Balance, shares at Dec. 31, 2015	58,696,115		58,696,115
Balance, value at Dec. 31, 2015	$ 408,790	393,363	$ 587	504,303	(111,527)	15,427
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(21,928)	(21,804)			(21,804)	(124)
Issuance of common stock, shares			708,327
Issuance of common stock, value	9,520	9,520	$ 7	9,513
Transfers to redeemable common stock	(3,065)	(3,065)		(3,065)
Redemptions of common stock, shares			(2,354,143)
Redemptions of common stock, value	(31,454)	(31,454)	$ (23)	(31,431)
Distributions declared	(16,468)	(16,468)			(16,468)
Acquisitions of noncontrolling interests	(37,986)	(23,942)		(23,942)		(14,044)
Noncontrolling interests contributions	769					769
Distributions to noncontrolling interests	$ (80)					(80)
Balance, shares at Sep. 30, 2016	57,050,299		57,050,299
Balance, value at Sep. 30, 2016	$ 308,098	$ 306,150	$ 571	$ 455,378	$ (149,799)	$ 1,948

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities:
Net (loss) income	$ (21,928)	$ 7,747
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Loss due to property damages	2,017	2,260
Equity in loss of unconsolidated joint venture	1,139	186
Depreciation and amortization	37,436	33,684
Non-cash interest income on real estate-related investments	0	(428)
Gain on sale of real estate, net	0	(11,195)
Other income	0	(5,084)
Deferred rent	(2,020)	(3,708)
Bad debt expense	488	323
Amortization of above- and below-market leases, net	(1,375)	(601)
Amortization of deferred financing costs	2,908	2,118
Amortization of discount on bonds and notes payable, net	28	18
Foreign currency transaction loss, net	4,602	0
Changes in assets and liabilities:
Restricted cash for operational expenditures	(958)	1,508
Rents and other receivables	(2,656)	(1,021)
Prepaid expenses and other assets	(7,255)	(5,957)
Accounts payable and accrued liabilities	3,950	1,732
Due to affiliates	(8)	1
Other liabilities	2,700	201
Net cash provided by operating activities	19,068	21,784
Cash Flows from Investing Activities:
Acquisition of real estate	(293,831)	0
Improvements to real estate	(21,466)	(24,209)
Proceeds from sales of real estate, net	0	25,045
Proceeds from condemnation agreements	0	5,914
Principal proceeds from assignment of real estate loan receivable	27,850	0
Insurance proceeds received for property damages	256	294
Investment in unconsolidated joint venture	(2,820)	(2,760)
Restricted cash for capital expenditures	(7,752)	0
Funding of restricted cash for development obligations	(2,575)	(4,643)
Net cash used in investing activities	(300,338)	(359)
Cash Flows from Financing Activities:
Proceeds from notes and bonds payable	462,178	51,182
Principal payments on notes and bonds payable	(74,707)	(30,314)
Payments of deferred financing costs	(10,641)	(297)
Restricted cash for debt service obligations	(5,345)	0
Payments to redeem common stock	(31,454)	(24,025)
Distributions paid	(6,948)	(6,483)
Noncontrolling interests contributions	769	751
Distributions to noncontrolling interests	(80)	(5,971)
Acquisitions of noncontrolling interests	(37,986)	0
Payments of other offering costs	(168)	0
Other financing proceeds, net	693	0
Net cash provided by (used in) financing activities	296,311	(15,157)
Effect of exchange rate changes on cash and cash equivalents	3,497	0
Net increase in cash and cash equivalents	18,538	6,268
Cash and cash equivalents, beginning of period	23,058	19,093
Cash and cash equivalents, end of period	41,596	25,361
Supplemental Disclosure of Cash Flow Information:
Interest paid, net of capitalized interest of $1,478 and $1,476 for the nine months ended September 30, 2016 and 2015, respectively	16,146	9,261
Supplemental Disclosure of Noncash Investing and Financing Activities:
Decrease in restricted cash in connection with development obligations	(2,726)	0
Increase in accrued improvements to real estate	1,686	0
Increase in development obligations	0	4,643
Distributions paid to common stockholders through common stock issuances pursuant to the dividend reinvestment plan	9,520	10,269
Increase in restricted cash related to insurance proceeds	$ 1,511	$ 0

CONSOLIDATED STATEMENTS OF CAS7

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Interest capitalized	$ 500	$ 500	$ 1,478	$ 1,476

ORGANIZATION

ORGANIZATION	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION KBS Strategic Opportunity REIT, Inc. (the “Company”) was formed on October 8, 2008 as a Maryland corporation and elected to be taxed as a real estate investment trust (“REIT”) beginning with the taxable year ended December 31, 2010. The Company conducts its business primarily through KBS Strategic Opportunity (BVI) Holdings, Ltd. (“KBS Strategic Opportunity BVI”), a private company limited by shares according to the British Virgin Islands Business Companies Act, 2004, which was incorporated on December 18, 2015 and is authorized to issue a maximum of 50,000 common shares with no par value. Upon incorporation, KBS Strategic Opportunity BVI issued one certificate containing 10,000 common shares with no par value to KBS Strategic Opportunity Limited Partnership (the “Operating Partnership”), a Delaware limited partnership formed on December 10, 2008. The Company is the sole general partner of, and owns a 0.1% partnership interest in the Operating Partnership. KBS Strategic Opportunity Holdings LLC (“REIT Holdings”), a Delaware limited liability company formed on December 9, 2008, owns the remaining 99.9% interest in the Operating Partnership and is its sole limited partner. The Company is the sole member and manager of REIT Holdings. Subject to certain restrictions and limitations, the business of the Company is externally managed by KBS Capital Advisors LLC (the “Advisor”), an affiliate of the Company, pursuant to an advisory agreement the Company renewed with the Advisor on October 8, 2016 (the “Advisory Agreement”). The Advisor conducts the Company’s operations and manages its portfolio of real estate. The Advisor owns 20,000 shares of the Company’s common stock. On January 8, 2009, the Company filed a registration statement on Form S-11 with the Securities and Exchange Commission (the “SEC”) to offer a minimum of 250,000 shares and a maximum of 140,000,000 shares of common stock for sale to the public (the “Offering”), of which 100,000,000 shares were registered in a primary offering and 40,000,000 shares were registered to be sold under the Company’s dividend reinvestment plan. The SEC declared the Company’s registration statement effective on November 20, 2009. The Company ceased offering shares of common stock in its primary offering on November 14, 2012 and continues to offer shares under its dividend reinvestment plan. The Company sold 56,584,976 shares of common stock in its primary offering for gross offering proceeds of $561.7 million . As of September 30, 2016 , the Company had sold 5,804,835 shares of common stock under its dividend reinvestment plan for gross offering proceeds of $ 62.3 million . Also, as of September 30, 2016 , the Company had redeemed 5,635,755 shares sold in the Offering for $ 69.9 million . Additionally, on December 29, 2011 and October 23, 2012, the Company issued 220,994 shares and 55,249 shares of common stock, respectively, for $2.0 million and $0.5 million , respectively, in private transactions exempt from the registration requirements pursuant to Section 4(2) of the Securities Act of 1933. On March 2, 2016, KBS Strategic Opportunity BVI filed a final prospectus with the Israel Securities Authority for a proposed offering of up to 1,000,000,000 Israeli new Shekels of Series A debentures (the “Debentures”) at an annual interest rate not to exceed 4.25% . On March 1, 2016, KBS Strategic Opportunity BVI commenced the institutional tender of the Debentures and accepted application for 842.5 million Israeli new Shekels. On March 7, 2016, KBS Strategic Opportunity BVI commenced the public tender of the Debentures and accepted 127.7 million Israeli new Shekels. In the aggregate, KBS Strategic Opportunity BVI accepted 970.2 million Israeli new Shekels (approximately $259.0 million as of September 30, 2016) in both the institutional and public tenders at an annual interest rate of 4.25% . KBS Strategic Opportunity BVI issued the Debentures on March 8, 2016. The terms of the Debentures require principal installment payments equal to 20% of the face value of the Debentures on March 1st of each year from 2019 to 2023. In connection with the above-referenced offering, on March 8, 2016, the Operating Partnership assigned to KBS Strategic Opportunity BVI all of its interests in the subsidiaries through which the Company indirectly owns all of its real estate and real estate-related investments. The Operating Partnership owns all of the issued and outstanding equity of KBS Strategic Opportunity BVI. As a result of these transactions, the Company now holds all of its real estate and real estate-related investments indirectly through KBS Strategic Opportunity BVI. As of September 30, 2016 , the Company owned 11 office properties, one office campus consisting of nine office buildings, one office portfolio consisting of four office buildings and 25 acres of undeveloped land, one office portfolio consisting of three office properties, one office/flex/industrial portfolio consisting of 21 buildings, one retail property, two apartment properties, two investments in undeveloped land encompassing an aggregate of 1,670 acres and two investments in unconsolidated joint ventures.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES There have been no significant changes to the Company’s accounting policies since it filed its audited financial statements in its Annual Report on Form 10-K for the year ended December 31, 2015 , except for the addition of accounting policies with respect to foreign currency transactions and derivative instruments. For further information about the Company’s accounting policies, refer to the Company’s consolidated financial statements and notes thereto for the year ended December 31, 2015 included in the Company’s Annual Report on Form 10-K filed with the SEC. Principles of Consolidation and Basis of Presentation The accompanying unaudited consolidated financial statements and condensed notes thereto have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC, including the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the unaudited consolidated financial statements do not include all of the information and footnotes required by GAAP for audited financial statements. In the opinion of management, the financial statements for the unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair and consistent presentation of the results for such periods. Operating results for the three and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for the year ending December 31, 2016. The consolidated financial statements include the accounts of the Company, REIT Holdings, the Operating Partnership, KBS Strategic Opportunity BVI and their direct and indirect wholly owned subsidiaries, and joint ventures in which the Company has a controlling interest. All significant intercompany balances and transactions are eliminated in consolidation. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates. Foreign Currency Transactions The U.S. dollar is the Company’s functional currency. Transactions denominated in currency other than the Company’s functional currency are recorded upon initial recognition at the exchange rate on the date of the transaction. After initial recognition, monetary assets and liabilities denominated in foreign currency are remeasured at each reporting date into the foreign currency at the exchange rate on that date. Exchange rate differences, other than those accounted for as hedging transactions, are recognized as foreign currency transaction gain or loss included in the Company’s consolidated statements of operations. Derivative Instruments The Company enters into derivative instruments for risk management purposes to hedge its exposure to cash flow variability caused by changing interest rates on its variable rate notes payable and enters into derivative instruments such as cross currency swaps, forward contracts, puts or calls for risk management purposes to hedge its exposure to variability in foreign currency exchange rates of the Israeli new Shekel versus the U.S. dollar. The Company records these derivative instruments at fair value on the accompanying consolidated balance sheets. Derivative instruments designated and qualifying as a hedge of the exposure to variability in expected future cash flows or other types of forecasted transactions are considered cash flow hedges. The change in fair value of the effective portion of a derivative instrument that is designated as a cash flow hedge is recorded as other comprehensive income (loss) on the accompanying consolidated statements of comprehensive income (loss) and consolidated statements of stockholders’ equity. The changes in fair value for derivative instruments that are not designated as a hedge or that do not meet the hedge accounting criteria are recorded as gain or loss on derivative instruments and included in earnings in the accompanying consolidated statements of operations. Reclassifications Certain amounts in the Company’s prior period consolidated financial statements have been reclassified to conform to the current period presentation. These reclassifications have not changed the results of operations of the prior period. Segments The Company has invested in non-performing loans, opportunistic real estate and other real estate-related assets. In general, the Company intends to hold its investments in non-performing loans, opportunistic real estate and other real estate-related assets for capital appreciation. Traditional performance metrics of non-performing loans, opportunistic real estate and other real estate-related assets may not be meaningful as these investments are generally non-stabilized and do not provide a consistent stream of interest income or rental revenue. These investments exhibit similar long-term financial performance and have similar economic characteristics. These investments typically involve a higher degree of risk and do not provide a constant stream of ongoing cash flows. As a result, the Company’s management views non-performing loans, opportunistic real estate and other real estate-related assets as similar investments. Substantially all of its revenue and net income (loss) is from non-performing loans, opportunistic real estate and other real estate-related assets, and therefore, the Company currently aggregates its operating segments into one reportable business segment. Per Share Data Basic net income (loss) per share of common stock is calculated by dividing net income (loss) attributable to common stockholders by the weighted-average number of shares of common stock issued and outstanding during such period. Diluted net income (loss) per share of common stock equals basic net income (loss) per share of common stock as there were no potentially dilutive securities outstanding during the three and nine months ended September 30, 2016 and 2015. Distributions declared per share were $0.094 and $0.280 during the three and nine months ended September 30, 2016 and $0.095 and $0.280 during the three and nine months ended September 30, 2015, respectively. Square Footage, Occupancy and Other Measures Any references to square footage, occupancy or annualized base rent are unaudited and outside the scope of the Company’s independent registered public accounting firm’s review of the Company’s financial statements in accordance with the standards of the United States Public Company Accounting Oversight Board. Recently Issued Accounting Standards Updates In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”). ASU No. 2014-09 requires an entity to recognize the revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. ASU No. 2014-09 supersedes the revenue requirements in Revenue Recognition (Topic 605) and most industry-specific guidance throughout the Industry Topics of the Codification. ASU No. 2014-09 does not apply to lease contracts within the scope of Leases (Topic 840). ASU No. 2014-09 was to be effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and is to be applied retrospectively, with early application not permitted. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date (“ASU No. 2015-14”), which defers the effective date of ASU No. 2014-09 by one year. Early adoption is permitted but not before the original effective date. The Company is still evaluating the impact of adopting ASU No. 2014-09 on its financial statements. In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements (Subtopic 205-40), Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (“ASU No. 2014-15”). The amendments in ASU No. 2014-15 require management to evaluate, for each annual and interim reporting period, whether there are conditions or events, considered in the aggregate, that raise substantial doubt about an entity’s ability to continue as a going concern within one year after the date that the financial statements are issued (or are available to be issued when applicable) and, if so, provide related disclosures. ASU No. 2014-15 is effective for annual periods ending after December 15, 2016, and interim periods within annual periods beginning after December 15, 2016. Early adoption is permitted for annual or interim reporting periods for which the financial statements have not previously been issued. The Company does not expect the adoption of ASU No. 2014-15 to have a significant impact on its financial statements. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis (“ASU No. 2015-02”), which amended the existing accounting standards for consolidation under both the variable interest model and the voting model. ASU No. 2015-02 modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. ASU No. 2015-02 is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments in ASU No. 2015-02 using: (a) a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption; or (b) by applying the amendments retrospectively. On January 1, 2016, the Company adopted ASU No. 2015-02 and re-evaluated its consolidation analysis of its joint ventures, concluding that such adoption did not result in (a) the classification of any entities as VIEs, (b) a consolidation of entities not previously consolidated or (c) a deconsolidation of entities previously consolidated. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU No. 2016-01”). The amendments in ASU No. 2016-01 address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU No. 2016-01 primarily affects accounting for equity investments and financial liabilities where the fair value option has been elected. ASU No. 2016-01 also requires entities to present financial assets and financial liabilities separately, grouped by measurement category and form of financial asset in the balance sheet or in the accompanying notes to the financial statements. ASU No. 2016-01 is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early application is permitted for financial statements that have not been previously issued. The Company does not expect the adoption of ASU No. 2016-01 to have a significant impact on its financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU No. 2016-02”). The amendments in ASU No. 2016-02 change the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU No. 2016-02 is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption of ASU No. 2016-02 is permitted. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is currently evaluating the impact of adopting the new leases standard on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) (“ASU No. 2016-13”). ASU No. 2016-13 affects entities holding financial assets and net investments in leases that are not accounted for at fair value through net income. The amendments in ASU No. 2016-13 require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. ASU No. 2016-13 also amends the impairment model for available-for-sale securities. An entity will recognize an allowance for credit losses on available-for-sale debt securities as a contra-account to the amortized cost basis rather than as a direct reduction of the amortized cost basis of the investment, as is currently required. ASU No. 2016-13 also requires new disclosures. For financial assets measured at amortized cost, an entity will be required to disclose information about how it developed its allowance for credit losses, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. For financing receivables and net investments in leases measured at amortized cost, an entity will be required to further disaggregate the information it currently discloses about the credit quality of these assets by year of the asset’s origination for as many as five annual periods. For available for sale securities, an entity will be required to provide a roll-forward of the allowance for credit losses and an aging analysis for securities that are past due. ASU No. 2016-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is still evaluating the impact of adopting ASU No. 2016-13 on its financial statements, but does not expect the adoption of ASU No. 2016-13 to have a material impact on its financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments (“ASU No. 2016-15”). ASU No. 2016-15 is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in ASU No. 2016-15 provide guidance on eight specific cash flow issues, including the following that are or may be relevant to the Company: (a) Cash payments for debt prepayment or debt extinguishment costs should be classified as cash outflows for financing activities; (b) Cash payments relating to contingent consideration made soon after an acquisition’s consummation date (i.e., approximately three months or less) should be classified as cash outflows for investing activities. Payments made thereafter should be classified as cash outflows for financing activities up to the amount of the original contingent consideration liability. Payments made in excess of the amount of the original contingent consideration liability should be classified as cash outflows for operating activities; (c) Cash payments received from the settlement of insurance claims should be classified on the basis of the nature of the loss (or each component loss, if an entity receives a lump-sum settlement); (d) Relating to distributions received from equity method investments, ASU No. 2016-15 provides an accounting policy election for classifying distributions received from equity method investments. Such amounts can be classified using a (1) cumulative earnings approach, or (2) nature of distribution approach. Under the cumulative earnings approach, an investor would compare the distributions received to its cumulative equity method earnings since inception. Any distributions received up to the amount of cumulative equity earnings would be considered a return on investment and classified in operating activities. Any excess distributions would be considered a return of investment and classified in investing activities. Alternatively, an investor can choose to classify the distributions based on the nature of activities of the investee that generated the distribution. If the necessary information is subsequently not available for an investee to determine the nature of the activities, the entity should use the cumulative earnings approach for that investee and report a change in accounting principle on a retrospective basis; (e) In the absence of specific guidance, an entity should classify each separately identifiable cash source and use on the basis of the nature of the underlying cash flows. For cash flows with aspects of more than one class that cannot be separated, the classification should be based on the activity that is likely to be the predominant source or use of cash flow. ASU No. 2016-15 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company is still evaluating the impact of adopting ASU No. 2016-15 on its financial statements, but does not expect the adoption of ASU No. 2016-15 to have a material impact on its financial statements.

REAL ESTATE HELD FOR INVESTMENT

REAL ESTATE HELD FOR INVESTMENT	9 Months Ended
	Sep. 30, 2016
Real Estate [Abstract]
REAL ESTATE FOR INVESTMENT	REAL ESTATE HELD FOR INVESTMENT As of September 30, 2016 , the Company owned 11 office properties, one office campus consisting of nine office buildings, one office portfolio consisting of four office buildings and 25 acres of undeveloped land, one office portfolio consisting of three office properties, one office/flex/industrial portfolio consisting of 21 buildings and one retail property encompassing, in the aggregate, approximately 5.5 million rentable square feet. As of September 30, 2016 , these properties were 87% occupied. In addition, the Company owned two apartment properties, containing 383 units and encompassing approximately 0.3 million rentable square feet, which were 90% occupied. The Company also owned two investments in undeveloped land encompassing an aggregate of 1,670 acres. The following table summarizes the Company’s real estate held for investment as of September 30, 2016 and December 31, 2015 , respectively (in thousands): September 30, 2016 December 31, 2015 Land $ 321,226 $ 223,201 Buildings and improvements 849,496 646,979 Tenant origination and absorption costs 52,297 43,894 Total real estate, cost 1,223,019 914,074 Accumulated depreciation and amortization (113,594 ) (91,560 ) Total real estate, net $ 1,109,425 $ 822,514 The following table provides summary information regarding the Company’s real estate held for investment as of September 30, 2016 (in thousands): Property Date Acquired or Foreclosed on City State Property Type Land Building and Improvements Tenant Origination and Absorption Costs Total Real Estate at Cost Accumulated Depreciation and Amortization Total Real Estate, Net Ownership % Northridge Center I & II 03/25/2011 Atlanta GA Office $ 2,234 $ 7,477 $ — $ 9,711 $ (2,309 ) $ 7,402 100.0 % Iron Point Business Park 06/21/2011 Folsom CA Office 2,671 19,629 — 22,300 (4,707 ) 17,593 100.0 % Richardson Portfolio: Palisades Central I 11/23/2011 Richardson TX Office 1,037 10,268 657 11,962 (2,463 ) 9,499 90.0 % Palisades Central II 11/23/2011 Richardson TX Office 810 18,066 749 19,625 (4,806 ) 14,819 90.0 % Greenway I 11/23/2011 Richardson TX Office 561 2,287 — 2,848 (631 ) 2,217 90.0 % Greenway III 11/23/2011 Richardson TX Office 702 3,698 559 4,959 (1,399 ) 3,560 90.0 % Undeveloped Land 11/23/2011 Richardson TX Undeveloped Land 3,134 — — 3,134 — 3,134 90.0 % Total Richardson Portfolio 6,244 34,319 1,965 42,528 (9,299 ) 33,229 Park Highlands (1) 12/30/2011 North Las Vegas NV Undeveloped Land 33,284 — — 33,284 — 33,284 (1) Bellevue Technology Center 07/31/2012 Bellevue WA Office 25,506 56,647 3,813 85,966 (10,480 ) 75,486 100.0 % Powers Ferry Landing East 09/24/2012 Atlanta GA Office 1,643 8,016 99 9,758 (2,185 ) 7,573 100.0 % 1800 West Loop 12/04/2012 Houston TX Office 8,360 60,546 5,079 73,985 (12,623 ) 61,362 100.0 % West Loop I & II 12/07/2012 Houston TX Office 7,300 31,535 1,864 40,699 (5,439 ) 35,260 100.0 % Burbank Collection 12/12/2012 Burbank CA Retail 4,175 10,229 725 15,129 (1,591 ) 13,538 90.0 % Austin Suburban Portfolio 03/28/2013 Austin TX Office 8,288 68,990 2,709 79,987 (11,239 ) 68,748 100.0 % Westmoor Center 06/12/2013 Westminster CO Office 10,058 65,240 5,671 80,969 (11,881 ) 69,088 100.0 % Central Building 07/10/2013 Seattle WA Office 7,015 26,942 1,914 35,871 (4,141 ) 31,730 100.0 % 50 Congress Street 07/11/2013 Boston MA Office 9,876 41,090 2,439 53,405 (6,255 ) 47,150 100.0 % 1180 Raymond 08/20/2013 Newark NJ Apartment 8,292 37,445 136 45,873 (3,730 ) 42,143 100.0 % Park Highlands II (2) 12/10/2013 North Las Vegas NV Undeveloped Land 23,065 — — 23,065 — 23,065 100.0 % Maitland Promenade II 12/18/2013 Orlando FL Office 3,434 24,995 3,757 32,186 (4,585 ) 27,601 100.0 % Plaza Buildings 01/14/2014 Bellevue WA Office 53,040 138,468 7,523 199,031 (17,065 ) 181,966 100.0 % 424 Bedford 01/31/2014 Brooklyn NY Apartment 8,860 25,408 — 34,268 (1,862 ) 32,406 90.0 % Richardson Land II 09/04/2014 Richardson TX Undeveloped Land 3,422 — — 3,422 — 3,422 90.0 % Westpark Portfolio 05/10/2016 Redmond WA Office/Flex/Industrial 36,085 82,355 8,913 127,353 (2,805 ) 124,548 100.0 % 353 Sacramento 07/11/2016 San Francisco CA Office 58,374 110,165 5,690 174,229 (1,398 ) 172,831 100.0 % $ 321,226 $ 849,496 $ 52,297 $ 1,223,019 $ (113,594 ) $ 1,109,425 _____________________ (1) On March 18, 2016, the Company increased its membership interest in the Park Highlands joint venture from 50.1% to 51.58% by acquiring an additional 1.48% membership interest from one of the joint venture partners. On June 6, 2016, the Company increased its membership interest in the Park Highlands joint venture from 51.58% to 97.62% by acquiring an additional 46.04% membership interest from one of the joint venture partners. On June 25, 2016, the Company increased its membership interest in the Park Highlands joint venture from 97.62% to 100% by acquiring the remaining 2.38% membership interest from the remaining joint venture partner. On September 7, 2016, a subsidiary of the Company that owns a portion of Park Highlands, sold 820 units of 10% Class A non-voting preferred membership units for $0.8 million to accredited investors. The amount of the Class A non-voting preferred membership units raised, net of offering costs, is included in other liabilities on the accompanying consolidated balance sheets. (2) On March 18, 2016, the Company increased its membership interest in the Park Highlands II joint venture from 99.5% to 100% by acquiring the remaining 0.5% membership interest from its joint venture partner. Operating Leases Certain of the Company’s real estate properties are leased to tenants under operating leases for which the terms and expirations vary. As of September 30, 2016 , the leases, excluding options to extend and apartment leases, which have terms that are generally one year or less, had remaining terms of up to 11.5 years with a weighted-average remaining term of 3.6 years. Some of the leases have provisions to extend the lease agreements, options for early termination after paying a specified penalty, rights of first refusal to purchase the property at competitive market rates, and other terms and conditions as negotiated. The Company retains substantially all of the risks and benefits of ownership of the real estate assets leased to tenants. Generally, upon the execution of a lease, the Company requires a security deposit from tenants in the form of a cash deposit and/or a letter of credit. The amount required as a security deposit varies depending upon the terms of the respective leases and the creditworthiness of the tenant, but generally are not significant amounts. Therefore, exposure to credit risk exists to the extent that a receivable from a tenant exceeds the amount of its security deposit. Security deposits received in cash and assumed in real estate acquisitions or foreclosures related to tenant leases are included in other liabilities in the accompanying consolidated balance sheets and totaled $7.2 million and $5.3 million as of September 30, 2016 and December 31, 2015 , respectively. During the nine months ended September 30, 2016 and 2015, the Company recognized deferred rent from tenants of $2.0 million and $3.7 million , respectively, net of lease incentive amortization. As of September 30, 2016 and December 31, 2015 , the cumulative deferred rent receivable balance, including unamortized lease incentive receivables, was $25.7 million and $22.8 million , respectively, and is included in rents and other receivables on the accompanying balance sheets. The cumulative deferred rent balance included $ 3.3 million and $2.8 million of unamortized lease incentives as of September 30, 2016 and December 31, 2015 , respectively. The Company records property operating expense reimbursements due from tenants for common area maintenance, real estate taxes, and other recoverable costs in the period the related expenses are incurred. As of September 30, 2016 , the future minimum rental income from the Company’s properties, excluding apartment leases, under non-cancelable operating leases was as follows (in thousands): October 1, 2016 through December 31, 2016 $ 24,511 2017 97,632 2018 82,183 2019 66,784 2020 51,453 Thereafter 114,798 $ 437,361 As of September 30, 2016 , the Company’s commercial real estate properties were leased to approximately 600 tenants over a diverse range of industries and geographic areas. The Company’s highest tenant industry concentrations (greater than 10% of annualized base rent) were as follows: Industry Number of Tenants Annualized Base Rent (1) (in thousands) Percentage of Annualized Base Rent Computer System Design & Programming 56 $ 11,502 11.0 % Finance 55 11,236 10.7 % $ 22,738 21.7 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2016 , adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term. No other tenant industries accounted for more than 10% of annualized base rent. No material tenant credit issues have been identified at this time. Geographic Concentration Risk As of September 30, 2016 , the Company’s real estate investments in Washington, California and Texas represented 31.7% , 15.6% and 15.5% of the Company’s total assets, respectively. As a result, the geographic concentration of the Company’s portfolio makes it particularly susceptible to adverse economic developments in the Washington, California and Texas real estate markets. Any adverse economic or real estate developments in these markets, such as business layoffs or downsizing, industry slowdowns, relocations of businesses, changing demographics and other factors, or any decrease in demand for office space resulting from the local business climate, could adversely affect the Company’s operating results and its ability to make distributions to stockholders. Property Damage During the nine months ended September 30, 2016 , 1800 West Loop suffered physical damages due to floods. The Company’s insurance policy provides coverage for property damage and business interruption subject to a deductible of up to $100,000 per incident. Based on management’s estimates, the Company recognized an estimated aggregate loss due to damages of $1.6 million during the nine months ended September 30, 2016 , which was reduced by $1.5 million of estimated insurance recoveries related to such damages, which the Company determined were probable of collection. The aggregate net loss due to damages of $0.1 million during the nine months ended September 30, 2016 was classified as operating, maintenance and management expenses on the accompanying consolidated statements of operations and relates to the Company’s insurance deductible. Recent Acquisitions On May 10, 2016, the Company, through an indirect wholly owned subsidiary (the “Westpark Portfolio Buyer”), acquired a portfolio of 21 office/flex/industrial buildings containing a total of 778,472 rentable square feet located on approximately 41 acres of land in Redmond, Washington (the “Westpark Portfolio”). The purchase price (net of closing credits) of the Westpark Portfolio was $125.8 million plus closing costs. The seller is not affiliated with the Company or the Advisor. The Company recorded $36.1 million to land, $81.2 million to building and improvements, $9.0 million to tenant origination and absorption costs, $0.1 million to above-market lease assets and $0.6 million to below-market lease liabilities during the nine months ended September 30, 2016 . The intangible assets and liabilities acquired in connection with this acquisition have weighted-average amortization periods as of the date of acquisition of 4.4 years for tenant origination and absorption costs, 2.7 years for above-market lease assets and 3.5 years for below-market lease liabilities. On July 11, 2016, the Company, through an indirect wholly owned subsidiary, acquired an office building containing 284,751 rentable square feet located on approximately 0.35 acres of land in San Francisco, California (“353 Sacramento”). The purchase price (net of closing credits) of 353 Sacramento was $168.0 million plus closing costs. The seller is not affiliated with the Company or the Advisor. The Company recorded $58.4 million to land, $110.0 million to building and improvements, $5.7 million to tenant origination and absorption costs and $6.1 million to below-market lease liabilities during the nine months ended September 30, 2016. The intangible assets and liabilities acquired in connection with this acquisition have weighted-average amortization periods as of the date of acquisition of 3.3 years for tenant origination and absorption costs and 2.6 years for below-market lease liabilities. The Company recorded these acquisitions as business combinations and expensed $3.5 million of acquisition costs related to the Westpark Portfolio and 353 Sacramento for the nine months ended September 30, 2016 . During the nine months ended September 30, 2016 , the Company recognized $8.0 million of total revenues and $3.3 million of operating expenses from these properties.

TENANT ORIGINATION AND ABSORPTI

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES	9 Months Ended
	Sep. 30, 2016
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES	TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES As of September 30, 2016 and December 31, 2015 , the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities (excluding fully amortized assets and liabilities and accumulated amortization) were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities September 30, December 31, September 30, December 31, September 30, December 31, Cost $ 52,297 $ 43,894 $ 2,302 $ 2,399 $ (11,463 ) $ (5,826 ) Accumulated Amortization (24,236 ) (22,749 ) (1,569 ) (1,361 ) 3,857 3,091 Net Amount $ 28,061 $ 21,145 $ 733 $ 1,038 $ (7,606 ) $ (2,735 ) Increases (decreases) in net income as a result of amortization of the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities for the three and nine months ended September 30, 2016 and 2015 were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Three Months Ended For the Three Months Ended For the Three Months Ended 2016 2015 2016 2015 2016 2015 Amortization $ (3,068 ) $ (2,617 ) $ (119 ) $ (189 ) $ 1,045 $ 382 Tenant Origination and Above-Market Below-Market For the Nine Months Ended For the Nine Months Ended For the Nine Months Ended 2016 2015 2016 2015 2016 2015 Amortization $ (7,765 ) $ (8,256 ) $ (359 ) $ (720 ) $ 1,734 $ 1,321 Additionally, as of September 30, 2016 and December 31, 2015 , the Company had recorded unamortized tax abatement intangible assets, which are included in prepaid expenses and other assets in the accompanying balance sheets, of $6.5 million and $7.2 million , respectively. During the three and nine months ended September 30, 2016 , the Company recorded amortization expense of $0.2 million and $0.7 million related to tax abatement intangible assets, respectively. During the three and nine months ended September 30, 2015, the Company recorded amortization expense of $0.2 million and $0.7 million related to tax abatement intangible assets, respectively.

REAL ESTATE LOAN RECEIVABLE

REAL ESTATE LOAN RECEIVABLE	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
REAL ESTATE LOAN RECEIVABLE	REAL ESTATE LOAN RECEIVABLE As of December 31, 2015, the Company owned one real estate loan receivable, which was repaid during the nine months ended September 30, 2016. The information for that real estate loan receivable as of September 30, 2016 and December 31, 2015 is set forth below (in thousands): Loan Name Location of Related Property or Collateral Date Originated Property Type Loan Type Outstanding Principal Balance as of September 30, 2016 Book Value as of September 30, 2016 Book Value as of December 31, 2015 (1) Contractual Interest Rate Annualized Effective Interest Rate Maturity Date University House First Mortgage New York, New York 3/20/2013 Student Housing Mortgage $ — $ — $ 27,850 (2) (2) (2) _____________________ (1) Book value of the real estate loan receivable represents outstanding principal balance adjusted for unamortized acquisition discounts, origination fees and direct origination and acquisition costs and additional interest accretion. (2) See below for additional discussion of the University House First Mortgage. On June 30, 2015, the University House First Mortgage matured without repayment. As a result, on July 1, 2015, the Company provided notice to the borrower of default. As of July 1, 2015, the Company had determined the University House Mortgage to be impaired and began recognizing income on a cash basis. The Company did not record a provision for loan loss reserves during the nine months ended September 30, 2016 or 2015 as the Company believed the entire principal balance of $27.9 million related to the University House First Mortgage to be fully recoverable. On April 21, 2016, the Company, through an indirect wholly owned subsidiary, entered into an assignment of mortgage to assign the University House First Mortgage to an assignee unaffiliated with the Company or the Advisor. On April 22, 2016, the Company received $31.6 million in connection with the assignment of the University House First Mortgage. The proceeds received from the assignment reflect the entire principal balance and interest due, including any default interest, as of April 21, 2016, plus any legal costs incurred by the Company in connection with the assignment. For the three and nine months ended September 30, 2016 and 2015, interest income from the real estate loan receivable consisted of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Contractual interest income $ — $ — $ 3,655 $ 1,540 Accretion of closing costs, origination fees and extension fees, net — — — 428 Interest income from real estate loan receivable $ — $ — $ 3,655 $ 1,968

REAL ESTATE SALES

REAL ESTATE SALES	9 Months Ended
	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
REAL ESTATE SALES	REAL ESTATE SALES In accordance with ASU No. 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU No. 2014-08”), results of operations from properties that are classified as held for sale in the ordinary course of business on or subsequent to January 1, 2014 would generally be included in continuing operations on the Company’s consolidated statements of operations. Results of operations from properties that were classified as held for sale in financial statements issued prior to January 1, 2014 will remain in discontinued operations on the Company’s consolidated statements of operations. Prior to the adoption of ASU 2014-08, the operations of properties held for sale or to be disposed of and the aggregate net gains recognized upon their disposition were presented as discontinued operations in the accompanying consolidated statements of operations for all periods presented. During the year ended December 31, 2015, the Company sold two office properties. The results of operations of these properties and gain on sale are included in continuing operations on the accompanying statements of operations. During the nine months ended September 30, 2016 , the Company did not have any dispositions and no properties were classified as held for sale as of September 30, 2016 . The following table summarizes certain revenue and expenses related to these properties for the three and nine months ended September 30, 2016 , and 2015 (in thousands): Three Months Ended Nine Months Ended September 30, 2016 2015 2016 2015 Total revenues $ — $ — $ — $ 216 Total expenses (2 ) 71 15 636

NOTES AND BONDS PAYABLE

NOTES AND BONDS PAYABLE	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
NOTES AND BONDS PAYABLE	NOTES AND BONDS PAYABLE As of September 30, 2016 and December 31, 2015 , the Company’s notes and bonds payable consisted of the following (dollars in thousands): Book Value as of Book Value as of Contractual Interest Rate as of September 30, 2016 (1) Effective Interest Rate at (1) Payment Type Maturity Date (2) Richardson Portfolio Mortgage Loan $ 40,746 $ 41,177 One-Month LIBOR + 2.10% 2.62% Principal 05/01/2017 Bellevue Technology Center Mortgage Loan 59,580 52,960 One-Month LIBOR + 2.25% 2.77% Principal 03/01/2017 Portfolio Revolving Loan Facility (3) 75,541 47,087 One-Month LIBOR + 2.25% 2.77% Principal 05/01/2017 Portfolio Mortgage Loan 106,847 100,032 One-Month LIBOR + 2.25% 2.77% Principal 07/01/2017 Burbank Collection Mortgage Loan 9,208 9,098 One-Month LIBOR + 2.35% 2.91% Interest Only (4) 09/30/2017 50 Congress Mortgage Loan 31,589 28,075 One-Month LIBOR + 1.90% 2.42% Interest Only (4) 10/01/2017 1180 Raymond Bond Payable 6,675 6,795 6.50% 6.50% Principal 09/01/2036 Central Building Mortgage Loan 27,600 24,896 One-Month LIBOR + 1.75% 2.27% Interest Only 11/13/2018 Maitland Promenade II Mortgage Loan (5) 19,922 20,182 One-Month LIBOR + 2.90% 3.42% Principal 01/01/2017 Westmoor Center Mortgage Loan 62,000 56,036 One-Month LIBOR + 2.25% 2.77% Interest Only (4) 02/01/2018 Plaza Buildings Senior Loan 110,182 111,000 One-Month LIBOR + 1.90% 2.42% Principal 01/14/2017 424 Bedford Mortgage Loan 24,966 25,358 3.91% 3.91% Principal 10/01/2022 1180 Raymond Mortgage Loan 31,000 28,100 One-Month LIBOR + 2.25% 2.77% Interest Only 12/01/2017 KBS SOR (BVI) Holdings, Ltd. Series A Debentures (6) 258,976 — 4.25% 4.25% (6) 03/01/2023 Westpark Portfolio Mortgage Loan (7) 83,200 — One-Month LIBOR + 2.50% 3.02% Interest Only (4) 07/01/2020 Total Notes and Bonds Payable principal outstanding 948,032 550,796 Net Premium/Discount on Notes and Bonds Payable (8) 78 50 Deferred financing costs, net (11,778 ) (3,523 ) Total Notes and Bonds Payable, net $ 936,332 $ 547,323 _____________________ (1) Contractual interest rate represents the interest rate in effect under the loan as of September 30, 2016 . Effective interest rate is calculated as the actual interest rate in effect as of September 30, 2016 (consisting of the contractual interest rate and contractual floor rates), using interest rate indices at September 30, 2016 , where applicable. (2) Represents the initial maturity date or the maturity date as extended as of September 30, 2016 ; subject to certain conditions, the maturity dates of certain loans may be extended beyond the date shown. (3) The Portfolio Revolving Loan Facility is secured by the 1800 West Loop Building and the Iron Point Business Park. The Portfolio Revolving Loan Facility is comprised of $63.5 million of revolving debt and $12.6 million of non-revolving debt available to be used for tenant improvements, leasing commissions and capital improvements, subject to certain terms and conditions contained in the loan documents. As of September 30, 2016 , $63.5 million of revolving debt and $12.0 million of non-revolving debt had been disbursed to the Company and $ 0.6 million of non-revolving debt is available for future disbursements, subject to certain conditions contained in the loan documents. (4) Represents the payment type required under the loan as of September 30, 2016 . Certain future monthly payments due under this loan also include amortizing principal payments. For more information of the Company’s contractual obligations under its notes and bonds payable, see five-year maturity table below. (5) Interest on the Maitland Promenade II Mortgage Loan is calculated at a variable annual rate of 290 basis points over one-month LIBOR, but at no point shall the interest rate be less than 3.25% . (6) See “– Recent Financing Transactions – Israeli Bond Financing” below. (7) See “– Recent Financing Transactions – Westpark Portfolio Mortgage Loan” below. (8) Represents the unamortized premium/discount on notes and bonds payable due to the above- and below-market interest rates when the debt was assumed. The discount/premium is amortized over the remaining life of the notes and bonds payable. During the three and nine months ended September 30, 2016 , the Company incurred $8.0 million and $20.4 million of interest expense, respectively. Included in interest expense for the three and nine months ended September 30, 2016 was $1.1 million and $ 2.9 million of amortization of deferred financing costs, respectively. Additionally, during the three and nine months ended September 30, 2016 , the Company capitalized $0.5 million and $1.5 million of interest to its investments in undeveloped land, respectively. During the three and nine months ended September 30, 2015, the Company incurred $3.5 million and $11.3 million of interest expense, respectively. Included in interest expense for the three and nine months ended September 30, 2015 was $0.6 million and $2.1 million of amortization of deferred financing costs, respectively. Additionally, during the three and nine months ended September 30, 2015, the Company capitalized $0.5 million and $1.5 million of interest to its investments in undeveloped land, respectively. As of September 30, 2016 , the Company’s deferred financing costs were $ 12.2 million , net of amortization, of which $11.8 million is included in notes and bonds payable, net and $0.4 million is included in prepaid expenses and other assets on the accompanying consolidated balance sheets. As of December 31, 2015 , the Company’s deferred financing costs were $ 4.7 million , net of amortization, of which $3.5 million is included in notes and bonds payable, net and $1.2 million is included in prepaid expenses and other assets on the accompanying consolidated balance sheets. As of September 30, 2016 and December 31, 2015 , the Company’s interest payable was $ 2.5 million and $ 1.2 million , respectively. The following is a schedule of maturities, including principal amortization payments, for all notes and bonds payable outstanding as of September 30, 2016 (in thousands): October 1, 2016 through December 31, 2016 $ 1,598 2017 484,509 2018 90,244 2019 53,686 2020 134,311 Thereafter 183,684 $ 948,032 The Company’s notes payable contain financial debt covenants. As of September 30, 2016 , the Company was in compliance with all of these debt covenants. Recent Financing Transactions Israeli Bond Financing On March 2, 2016, KBS Strategic Opportunity BVI, a wholly owned subsidiary of the Company, filed a final prospectus with the Israel Securities Authority for a proposed offering of up to 1,000,000,000 Israeli new Shekels of Series A debentures (the “Debentures”) at an annual interest rate not to exceed 4.25% . On March 1, 2016, KBS Strategic Opportunity BVI commenced the institutional tender of the Debentures and accepted application for 842.5 million Israeli new Shekels. On March 7, 2016, KBS Strategic Opportunity BVI commenced the public tender of the Debentures and accepted 127.7 million Israeli new Shekels. In the aggregate, KBS Strategic Opportunity BVI accepted 970.2 million Israeli new Shekels (approximately $259.0 million as of September 30, 2016) in both the institutional and public tenders at an annual interest rate of 4.25% . KBS Strategic Opportunity BVI issued the Debentures on March 8, 2016. The terms of the Debentures require principal installment payments equal to 20% of the face value of the Debentures on March 1st of each year from 2019 to 2023. As of September 30, 2016, the Company incurred legal, rating and underwriting fees of approximately $9.8 million in connection with the offering. In addition, the Company funded interest reserves of 20.8 million Israeli new Shekels (approximately $5.5 million as of September 30, 2016) and 1.0 million Israeli new Shekels (approximately $0.3 million as of September 30, 2016) of expense reserve required by the Debenture documents. The deed of trust that governs the terms of the Debentures contains various financial covenants. As of September 30, 2016 , the Company was in compliance with all of these financial debt covenants. Westpark Portfolio Mortgage Loan On July 8, 2016, the Westpark Portfolio Buyer, entered into a four -year mortgage loan with an unaffiliated lender, for borrowings of up to $85.2 million secured by the Westpark Portfolio (the “Westpark Portfolio Mortgage Loan”). At closing, $83.2 million of the loan was funded and the remaining $2.0 million was available for future disbursements to be used for tenant improvement costs and leasing commissions, subject to certain terms and conditions contained in the loan documents. The Westpark Portfolio Mortgage Loan matures on July 1, 2020, with a one -year extension option, subject to certain terms and conditions contained in the loan documents. The Westpark Portfolio Mortgage Loan bears interest at a floating rate of 250 basis points over one-month LIBOR. The Westpark Portfolio Buyer has the right to prepay the loan in whole at any time, or in part from time to time. KBS SOR Properties LLC (“KBS SOR Properties”), the Company’s indirect wholly owned subsidiary, provided a limited guaranty of the Westpark Portfolio Mortgage Loan with respect to certain potential fees, costs, expenses, losses or damages incurred or suffered by the lender as a result of certain intentional actions committed by the Westpark Portfolio Buyer in violation of the loan documents. KBS SOR Properties also provided a guaranty of the principal balance and any interest or other sums outstanding under the Westpark Portfolio Mortgage Loan in the event of certain bankruptcy or insolvency proceedings involving the Westpark Portfolio Buyer.

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS The Company enters into derivative instruments for risk management purposes to hedge its exposure to cash flow variability caused by changing interest rates and foreign currency exchange rate movements. The primary goal of the Company’s risk management practices related to interest rate risk is to prevent changes in interest rates from adversely impacting the Company’s ability to achieve its investment return objectives. The Company does not enter into derivatives for speculative purposes. On October 14, 2016, the Company entered into an interest rate cap. See Note 14, “Subsequent Events — Financing Subsequent to September 30, 2016 — 353 Sacramento Mortgage Loan.” The Company enters into foreign currency collars to mitigate its exposure to foreign currency exchange rate movements on its bonds payable outstanding denominated in Israeli new Shekels. The foreign currency collar consists of a purchased call option to buy and a sold put option to sell the Israeli new Shekels. A foreign currency collar guarantees that the exchange rate of the currency will not fluctuate beyond the range of the options’ strike prices. The following table summarizes the notional amount and other information related to the Company’s foreign currency collars as of September 30, 2016. The notional amount is an indication of the extent of the Company’s involvement in each instrument at that time, but does not represent exposure to credit, interest rate or market risks (currency in thousands): Derivative Instruments Notional Amount Strike Price Trade Date Maturity Date Derivative instruments not designated as hedging instruments Foreign currency collar $ 100,000 3.72 - 3.83 ILS-USD 08/08/2016 08/08/2017 Foreign currency collar 50,000 3.67 - 3.77 ILS-USD 08/16/2016 08/16/2017 Foreign currency collar 50,000 3.68 - 3.78 ILS-USD 08/16/2016 08/16/2017 Foreign currency collar 50,000 3.67 - 3.77 ILS-USD 08/22/2016 08/22/2017 $ 250,000 The following table sets forth the fair value of the Company’s derivative instruments as well as their classification on the consolidated balance sheets as of September 30, 2016 (dollars in thousands): September 30, 2016 Derivative Instruments Balance Sheet Location Number of Instruments Fair Value Derivative instruments not designated as hedging instruments Foreign currency collars Prepaid expenses and other assets 4 $ 1,527 The change in fair value of foreign currency collars that are not designated as cash flow hedges are recorded as foreign currency transaction gains or losses in the accompanying consolidated statements of operations. During both the three and nine months ended September 30, 2016, the Company recognized a $1.5 million gain related to the foreign currency collars, which is shown net against $8.2 million and $6.1 million of foreign currency transaction losses in the accompanying consolidated statements of operations as foreign currency transaction loss, net, respectively.

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES	FAIR VALUE DISCLOSURES Under GAAP, the Company is required to measure certain financial instruments at fair value on a recurring basis. In addition, the Company is required to measure other non-financial and financial assets at fair value on a non-recurring basis (e.g., carrying value of impaired real estate loans receivable and long-lived assets). Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The GAAP fair value framework uses a three-tiered approach. Fair value measurements are classified and disclosed in one of the following three categories: • Level 1: unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities; • Level 2: quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and • Level 3: prices or valuation techniques where little or no market data is available that requires inputs that are both significant to the fair value measurement and unobservable. The fair value for certain financial instruments is derived using valuation techniques that involve significant management judgment. The price transparency of financial instruments is a key determinant of the degree of judgment involved in determining the fair value of the Company’s financial instruments. Financial instruments for which actively quoted prices or pricing parameters are available and for which markets contain orderly transactions will generally have a higher degree of price transparency than financial instruments for which markets are inactive or consist of non-orderly trades. The Company evaluates several factors when determining if a market is inactive or when market transactions are not orderly. The following is a summary of the methods and assumptions used by management in estimating the fair value of each class of financial instruments for which it is practicable to estimate the fair value: Cash and cash equivalents, rent and other receivables and accounts payable and accrued liabilities: These balances approximate their fair values due to the short maturities of these items. Real estate loan receivable: The Company’s real estate loan receivable is presented in the accompanying consolidated balance sheets at its amortized cost net of recorded loan loss reserves and not at fair value. The fair value of real estate loan receivable was estimated using an internal valuation model that considers the expected cash flows for the loans, underlying collateral values (for collateral dependent loans) and estimated yield requirements of institutional investors for loans with similar characteristics, including remaining loan term, loan-to-value, type of collateral and other credit enhancements. The Company classifies these inputs as Level 3 inputs. Notes and bonds payable: The fair values of the Company’s notes and bonds payable are estimated using a discounted cash flow analysis based on management’s estimates of current market interest rates for instruments with similar characteristics, including remaining loan term, loan-to-value ratio, type of collateral and other credit enhancements. Additionally, when determining the fair value of liabilities in circumstances in which a quoted price in an active market for an identical liability is not available, the Company measures fair value using (i) a valuation technique that uses the quoted price of the identical liability when traded as an asset or quoted prices for similar liabilities or similar liabilities when traded as assets or (ii) another valuation technique that is consistent with the principles of fair value measurement, such as the income approach or the market approach. The Company classifies these inputs as Level 3 inputs. The Company’s bonds issued in Israel are publicly traded on the Tel-Aviv Stock Exchange. The Company used the quoted price as of September 30, 2016 for the fair value of its bonds issued in Israel. The Company classifies this input as a Level 1 input. Derivative instruments: The Company’s derivative instruments are presented at fair value on the accompanying consolidated balance sheets. The valuation of these instruments is determined using a proprietary model that utilizes observable inputs. As such, the Company classifies these inputs as Level 2 inputs. The following were the face values, carrying amounts and fair values of the Company’s financial instruments as of September 30, 2016 and December 31, 2015 , which carrying amounts do not approximate the fair values (in thousands): September 30, 2016 December 31, 2015 Face Value Carrying Amount Fair Value Face Value Carrying Amount Fair Value Financial assets: Real estate loan receivable $ — $ — $ — $ 27,850 $ 27,850 $ 27,850 Financial liabilities: Notes and bonds payable $ 689,056 $ 686,169 $ 691,413 $ 550,796 $ 547,323 $ 554,007 KBS SOR (BVI) Holdings, Ltd. Series A Debentures $ 258,976 $ 250,163 $ 250,222 $ — $ — $ — Disclosure of the fair value of financial instruments is based on pertinent information available to the Company as of the period end and requires a significant amount of judgment. This has made the estimation of fair values difficult and, therefore, both the actual results and the Company’s estimate of value at a future date could be materially different. As of September 30, 2016, the Company measured the following assets at fair value (in thousands): Fair Value Measurements Using Total Quoted Prices in Active Markets (Level 1) Significant Other Observable (Level 2) Significant Unobservable (Level 3) Recurring Basis: Asset derivatives - foreign currency collars $ 1,527 $ — $ 1,527 $ —

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS The Advisory Agreement entitles the Advisor to specified fees upon the provision of certain services with regard to the investment of funds in real estate and real estate-related investments and the disposition of real estate and real estate-related investments (including the discounted payoff of non-performing loans) among other services, as well as reimbursement of certain costs incurred by the Advisor in providing services to the Company. The Advisory Agreement may also entitle the Advisor to certain back-end cash flow participation fees. The Company also entered into a fee reimbursement agreement (the “AIP Reimbursement Agreement”) with KBS Capital Markets Group LLC, the dealer manager for the Company’s initial public offering (the “Dealer Manager”), pursuant to which the Company agreed to reimburse the Dealer Manager for certain fees and expenses it incurs for administering the Company’s participation in the Depository Trust & Clearing Corporation Alternative Investment Product Platform with respect to certain accounts of the Company’s investors serviced through the platform. The Advisor and Dealer Manager also serve as the advisor and dealer manager, respectively, for KBS Real Estate Investment Trust, Inc. (“KBS REIT I”), KBS Real Estate Investment Trust II, Inc. (“KBS REIT II”), KBS Real Estate Investment Trust III, Inc. (“KBS REIT III”), KBS Legacy Partners Apartment REIT, Inc. (“KBS Legacy Partners Apartment REIT”), KBS Strategic Opportunity REIT II, Inc. (“KBS Strategic Opportunity REIT II”) and KBS Growth & Income REIT, Inc. (“KBS Growth & Income REIT”). On January 6, 2014, the Company, together with KBS REIT I, KBS REIT II, KBS REIT III, KBS Legacy Partners Apartment REIT, KBS Strategic Opportunity REIT II, the Dealer Manager, the Advisor and other KBS-affiliated entities, entered into an errors and omissions and directors and officers liability insurance program where the lower tiers of coverage are shared. The cost of these lower tiers is allocated by the Advisor and its insurance broker among each of the various entities covered by the plan, and is billed directly to each entity. The allocation of these shared coverage costs is proportionate to the pricing by the insurance marketplace for the first tiers of directors and officers liability coverage purchased individually by each REIT. The Advisor’s and the Dealer Manager’s portion of the shared lower tiers’ cost is proportionate to the respective entities’ prior cost for the errors and omissions insurance. In June 2015, KBS Growth & Income REIT was added to the insurance program at terms similar to those described above. The insurance program was renewed and is effective through June 30, 2017. During the three and nine months ended September 30, 2016 and 2015, no other business transactions occurred between the Company and these other KBS-sponsored programs. Pursuant to the terms of these agreements, summarized below are the related-party costs incurred by the Company for the three and nine months ended September 30, 2016 and 2015, respectively, and any related amounts payable as of September 30, 2016 and December 31, 2015 (in thousands): Incurred Payable as of Three Months Ended September 30, Nine Months Ended September 30, September 30, December 31, 2016 2015 2016 2015 2016 2015 Expensed Asset management fees $ 2,639 $ 2,112 $ 6,932 $ 6,242 $ — $ — Real estate acquisition fees 1,690 — 2,964 — — — Reimbursable operating expenses (1) 57 39 170 116 51 59 Disposition fees (2) — 78 279 180 — — $ 4,386 $ 2,229 $ 10,345 $ 6,538 $ 51 $ 59 _____________________ (1) The Advisor may seek reimbursement for certain employee costs under the Advisory Agreement. The Company has reimbursed the Advisor for the Company’s allocable portion of the salaries, benefits and overhead of internal audit department personnel providing services to the Company. These amounts totaled $ 30,000 and $ 36,000 for the three months ended September 30, 2016 and 2015 , respectively and $114,000 and $98,000 for the nine months ended September 30, 2016 and 2015, respectively, and were the only employee costs reimbursed under the Advisory Agreement during these periods. The Company will not reimburse for employee costs in connection with services for which the Advisor earns acquisition, origination or disposition fees (other than reimbursement of travel and communication expenses) or for the salaries or benefits the Advisor or its affiliates may pay to the Company’s executive officers. In addition to the amounts above, the Company reimburses the Advisor for certain of the Company’s direct costs incurred from third parties that were initially paid by the Advisor on behalf of the Company. (2) Disposition fees with respect to real estate sold are included in the gain on sale of real estate in the accompanying consolidated statements of operations. Disposition fees with respect to the assignment of the Company's real estate loan receivable are included in general and administrative expenses in the accompanying consolidated statements of operations. During the nine months ended September 30, 2016 , the Advisor reimbursed the Company $66,000 for property insurance rebates and $69,000 for legal and professional fees.

INVESTMENT IN UNCONSOLIDATED JO

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES	9 Months Ended
	Sep. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES	INVESTMENT IN UNCONSOLIDATED JOINT VENTURES As of September 30, 2016 and December 31, 2015 , the Company’s investments in unconsolidated joint ventures were composed of the following (dollars in thousands): Investment Balance at Joint Venture Number of Properties Location Ownership % September 30, 2016 December 31, 2015 NIP Joint Venture 21 Various Less than 5.0% $ 5,305 $ 5,305 110 William Joint Venture 1 New York, New York 60.0% 70,813 69,132 $ 76,118 $ 74,437 Investment in National Industrial Portfolio Joint Venture On May 18, 2012, the Company, through an indirect wholly owned subsidiary, entered into a joint venture (the “NIP Joint Venture”) with OCM NIP JV Holdings, L.P. and HC KBS NIP JV, LLC (“HC-KBS”). The NIP Joint Venture owns 21 industrial properties and a master lease with respect to another industrial property encompassing 10.8 million square feet. The Company made an initial capital contribution of $8.0 million which represents less than a 5.0% ownership interest in the NIP Joint Venture as of September 30, 2016 . The Company has virtually no influence over the NIP Joint Venture’s operations, financial policies or decision making. Accordingly, the Company has accounted for its investment in the NIP Joint Venture under the cost method of accounting. Income, losses and distributions from the NIP Joint Venture are generally allocated among the members based on their respective equity interests. KBS REIT I, an affiliate of the Advisor, is a member of HC-KBS and has a participation interest in certain future potential profits generated by the NIP Joint Venture. However, KBS REIT I does not have any equity interest in the NIP Joint Venture. None of the other joint venture partners are affiliated with the Company or the Advisor. As of September 30, 2016 and December 31, 2015 , the book value of the Company’s investment in the NIP Joint Venture was $5.3 million . During the three and nine months ended September 30, 2016 and 2015, the Company did not receive any distributions related to its investment in the NIP Joint Venture. Investment in 110 William Joint Venture On December 23, 2013, the Company, through an indirect wholly owned subsidiary, entered into an agreement with SREF III 110 William JV, LLC (the “110 William JV Partner”) to form a joint venture (the “110 William Joint Venture”). On May 2, 2014, the 110 William Joint Venture acquired an office property containing 928,157 rentable square feet located on approximately 0.8 acres of land in New York, New York (“110 William Street”). Each of the Company and the 110 William JV Partner hold a 60% and 40% ownership interest in the 110 William Joint Venture, respectively. The Company exercises significant influence over the operations, financial policies and decision making with respect to the 110 William Joint Venture but significant decisions require approval from both members. Accordingly, the Company has accounted for its investment in the 110 William Joint Venture under the equity method of accounting. Income, losses, contributions and distributions are generally allocated based on the members’ respective equity interests. As of September 30, 2016 and December 31, 2015 , the book value of the Company’s investment in the 110 William Joint Venture was $70.8 million and $69.1 million , respectively, which includes $1.5 million of unamortized acquisition fees and expenses incurred directly by the Company. Summarized financial information for the 110 William Joint Venture follows (in thousands): September 30, 2016 December 31, 2015 Assets: Real estate assets, net of accumulated depreciation and amortization $ 264,342 $ 269,664 Other assets 23,251 18,973 Total assets $ 287,593 $ 288,637 Liabilities and Equity: Notes payable, net (1) $ 158,845 $ 162,395 Other liabilities 13,269 13,617 Partners’ capital 115,479 112,625 Total Liabilities and Equity $ 287,593 $ 288,637 _____________________ (1) Includes (i) a first mortgage loan with an outstanding principal balance of $136.9 million and $138.6 million as of September 30, 2016 and December 31, 2015 , respectively, bearing interest at a fixed rate of 4.8% per annum and maturing on July 6, 2017 and (ii) a mezzanine loan with an outstanding principal balance of $20.0 million as of September 30, 2016 and December 31, 2015 bearing interest at a fixed rate of 9.5% per annum and maturing on July 6, 2017. The amount presented includes a premium on notes payable of $2.3 million and $4.5 million as of September 30, 2016 and December 31, 2015 , respectively and deferred financing costs, net of $0.3 million and $0.7 million as of September 30, 2016 and December 31, 2015, respectively. Three Months Ended Nine Months Ended 2016 2015 2016 2015 Revenues $ 8,461 $ 9,214 $ 25,100 $ 25,911 Expenses: Operating, maintenance, and management 3,162 2,569 8,120 8,056 Real estate taxes and insurance 1,535 1,642 4,502 4,329 Depreciation and amortization 3,563 3,194 9,831 9,476 Interest expense 1,517 1,552 4,541 4,627 Total expenses 9,777 8,957 26,994 26,488 Other income 16 11 48 319 Net (loss) income $ (1,300 ) $ 268 $ (1,846 ) $ (258 ) Company’s equity in (loss) income of unconsolidated joint venture $ (791 ) $ 150 $ (1,139 ) $ (186 )

UNAUDITED PRO FORMA FINANCIAL I

UNAUDITED PRO FORMA FINANCIAL INFORMATION	9 Months Ended
	Sep. 30, 2016
Business Acquisition, Pro Forma Information [Abstract]
UNAUDITED PRO FORMA FINANCIAL INFORMATION	UNAUDITED PRO FORMA FINANCIAL INFORMATION The Company acquired one office portfolio and one office property during the nine months ended September 30, 2016 , which were accounted for as business combinations. The following unaudited pro forma information for the three and nine months ended September 30, 2016 and 2015 has been prepared to give effect to the acquisition of the Westpark Portfolio and 353 Sacramento as if the acquisitions occurred on January 1, 2015. This pro forma information does not purport to represent what the actual results of operations of the Company would have been had the acquisitions occurred on this date, nor does it purport to predict the results of operations for future periods (in thousands). For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Revenues $ 36,478 $ 33,779 $ 108,795 $ 101,632 Depreciation and amortization $ 14,472 $ 13,582 $ 41,989 $ 40,539 Net (loss) income $ (12,990 ) $ (119 ) $ (18,101 ) $ 8,221 The unaudited pro forma information for the three and nine months ended September 30, 2016 was adjusted to exclude $2.0 million and $3.5 million of acquisition costs related to the Westpark Portfolio and 353 Sacramento incurred by the Company in 2016, respectively.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Economic Dependency The Company is dependent on the Advisor for certain services that are essential to the Company, including the identification, evaluation, negotiation, origination, acquisition and disposition of investments; management of the daily operations of the Company’s investment portfolio; and other general and administrative responsibilities. In the event that the Advisor is unable to provide these services, the Company will be required to obtain such services from other sources. Environmental As an owner of real estate, the Company is subject to various environmental laws of federal, state and local governments. Although there can be no assurance, the Company is not aware of any environmental liability that could have a material adverse effect on its financial condition or results of operations as of September 30, 2016 . However, changes in applicable environmental laws and regulations, the uses and conditions of properties in the vicinity of the Company’s properties, the activities of its tenants and other environmental conditions of which the Company is unaware with respect to the properties could result in future environmental liabilities. Legal Matters From time to time, the Company is a party to legal proceedings that arise in the ordinary course of its business. Management is not aware of any legal proceedings of which the outcome is probable or reasonably possible to have a material adverse effect on the Company’s results of operations or financial condition, which would require accrual or disclosure of the contingency and the possible range of loss. Additionally, the Company has not recorded any loss contingencies related to legal proceedings in which the potential loss is deemed to be remote.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2016
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Company evaluates subsequent events up until the date the consolidated financial statements are issued. Real Estate Related Investment Subsequent to September 30, 2016 Battery Point Series B Preferred Units On October 28, 2016, the Company, through an indirect wholly owned subsidiary, entered into a purchase agreement to purchase up to an aggregate of 25,000 units of Series B Preferred Units (the “Preferred Units”) of Battery Point Trust LLC (“Battery Point”), over a six-month period at a per-unit price of $1,000 , resulting in an aggregate investment of $25.0 million . On October 28, 2016, the Company purchased an initial 5,000 Preferred Units, net of an equity commitment fee of $0.6 million , for a net payment of $4.4 million . The Preferred Units are entitled to the payment of quarterly distributions at the following annual rates: 7.0% for the period commencing October 28, 2016 through April 28, 2017; 9.0% for the period commencing April 29, 2017 through April 28, 2018; and 12.0% for the period commencing April 29, 2018 through October 28, 2019. The Company may be required to purchase additional Preferred Units no more frequently than once a month during the period beginning in November 2016 and ending in April 2017. Each minimum required additional purchase of Preferred Units is 5,000 units. Battery Point may redeem the Preferred Units at any time, subject to payment to the Company of an exit fee in the amount of 1.0% of the redemption price if Battery Point redeems the Preferred Units after April 28, 2017. Financing Subsequent to September 30, 2016 353 Sacramento Mortgage Loan On October 14, 2016, the Company, through an indirect wholly owned subsidiary, entered into a two -year secured mortgage loan with an unaffiliated lender, for borrowings of up to $115.5 million secured by 353 Sacramento (the “353 Sacramento Mortgage Loan”). As of October 14, 2016, $85.5 million had been disbursed to the Company with the remaining $30.0 million available for future disbursements to be used for tenant improvements, leasing commissions and capital improvements, subject to certain terms and conditions contained in the loan documents. The 353 Sacramento Mortgage Loan matures on October 14, 2018 with three one -year extension options, subject to certain conditions contained in the loan documents and the payment of an extension fee of 0.25% of the outstanding principal balance with respect to the second and third extension options. The 353 Sacramento Mortgage Loan bears interest at a floating rate of 275 basis points over one-month LIBOR. The borrower entered into an interest rate cap that effectively limits one-month LIBOR on $115.5 million of the outstanding loan balance at 3.0% effective October 14, 2016 through October 14, 2018. Monthly payments are interest-only with the entire unpaid principal balance and all outstanding interest and fees due at maturity. The Company has the right to prepay the loan in whole at any time or in part from time to time to the extent necessary, subject to the payment of certain expenses potentially incurred by the lender as a result of the prepayment, the payment of a prepayment premium and certain other conditions contained in the loan documents. KBS SOR Properties provided a limited guaranty of the 353 Sacramento Mortgage Loan with respect to certain potential deficiencies, losses or damages suffered by the lender resulting from certain intentional acts committed by the borrower or KBS SOR Properties in violation of the loan documents, or in the event of certain bankruptcy or insolvency proceedings involving the borrower or KBS SOR Properties. As a condition to the 353 Sacramento Mortgage Loan, the borrowing subsidiary amended its operating agreement to appoint two independent managers. The independent managers have consent rights with respect to (i) the consolidation or merger of the borrower into another entity if the 353 Sacramento Mortgage Loan will not be paid off in connection with such merger or consolidation, (ii) the sale of the borrower’s assets if the 353 Sacramento Mortgage Loan will not be paid off in connection with such a sale and (iii) the institution of voluntary (or the consent to involuntary) bankruptcy or similar creditor-protection proceedings. Such consent rights will only apply as long as the 353 Sacramento Mortgage Loan remains outstanding.

SUMMARY OF SIGNIFICANT ACCOUN22

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited consolidated financial statements and condensed notes thereto have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC, including the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the unaudited consolidated financial statements do not include all of the information and footnotes required by GAAP for audited financial statements. In the opinion of management, the financial statements for the unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair and consistent presentation of the results for such periods. Operating results for the three and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for the year ending December 31, 2016.
Principles of Consolidation	The consolidated financial statements include the accounts of the Company, REIT Holdings, the Operating Partnership, KBS Strategic Opportunity BVI and their direct and indirect wholly owned subsidiaries, and joint ventures in which the Company has a controlling interest. All significant intercompany balances and transactions are eliminated in consolidation.
Use of Estimates	The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.
Foreign Currency Transactions	The U.S. dollar is the Company’s functional currency. Transactions denominated in currency other than the Company’s functional currency are recorded upon initial recognition at the exchange rate on the date of the transaction. After initial recognition, monetary assets and liabilities denominated in foreign currency are remeasured at each reporting date into the foreign currency at the exchange rate on that date. Exchange rate differences, other than those accounted for as hedging transactions, are recognized as foreign currency transaction gain or loss included in the Company’s consolidated statements of operations.
Derivative Instruments	The Company enters into derivative instruments for risk management purposes to hedge its exposure to cash flow variability caused by changing interest rates on its variable rate notes payable and enters into derivative instruments such as cross currency swaps, forward contracts, puts or calls for risk management purposes to hedge its exposure to variability in foreign currency exchange rates of the Israeli new Shekel versus the U.S. dollar. The Company records these derivative instruments at fair value on the accompanying consolidated balance sheets. Derivative instruments designated and qualifying as a hedge of the exposure to variability in expected future cash flows or other types of forecasted transactions are considered cash flow hedges. The change in fair value of the effective portion of a derivative instrument that is designated as a cash flow hedge is recorded as other comprehensive income (loss) on the accompanying consolidated statements of comprehensive income (loss) and consolidated statements of stockholders’ equity. The changes in fair value for derivative instruments that are not designated as a hedge or that do not meet the hedge accounting criteria are recorded as gain or loss on derivative instruments and included in earnings in the accompanying consolidated statements of operations.
Reclassifications	Certain amounts in the Company’s prior period consolidated financial statements have been reclassified to conform to the current period presentation. These reclassifications have not changed the results of operations of the prior period.
Segments	The Company has invested in non-performing loans, opportunistic real estate and other real estate-related assets. In general, the Company intends to hold its investments in non-performing loans, opportunistic real estate and other real estate-related assets for capital appreciation. Traditional performance metrics of non-performing loans, opportunistic real estate and other real estate-related assets may not be meaningful as these investments are generally non-stabilized and do not provide a consistent stream of interest income or rental revenue. These investments exhibit similar long-term financial performance and have similar economic characteristics. These investments typically involve a higher degree of risk and do not provide a constant stream of ongoing cash flows. As a result, the Company’s management views non-performing loans, opportunistic real estate and other real estate-related assets as similar investments. Substantially all of its revenue and net income (loss) is from non-performing loans, opportunistic real estate and other real estate-related assets, and therefore, the Company currently aggregates its operating segments into one reportable business segment.
Per Share Data	Basic net income (loss) per share of common stock is calculated by dividing net income (loss) attributable to common stockholders by the weighted-average number of shares of common stock issued and outstanding during such period. Diluted net income (loss) per share of common stock equals basic net income (loss) per share of common stock as there were no potentially dilutive securities outstanding during the three and nine months ended September 30, 2016 and 2015. Distributions declared per share were $0.094 and $0.280 during the three and nine months ended September 30, 2016 and $0.095 and $0.280 during the three and nine months ended September 30, 2015, respectively.
Square Footage, Occupancy and Other Measures	Any references to square footage, occupancy or annualized base rent are unaudited and outside the scope of the Company’s independent registered public accounting firm’s review of the Company’s financial statements in accordance with the standards of the United States Public Company Accounting Oversight Board.
Recently Issued Accounting Standards Updates	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”). ASU No. 2014-09 requires an entity to recognize the revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. ASU No. 2014-09 supersedes the revenue requirements in Revenue Recognition (Topic 605) and most industry-specific guidance throughout the Industry Topics of the Codification. ASU No. 2014-09 does not apply to lease contracts within the scope of Leases (Topic 840). ASU No. 2014-09 was to be effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and is to be applied retrospectively, with early application not permitted. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date (“ASU No. 2015-14”), which defers the effective date of ASU No. 2014-09 by one year. Early adoption is permitted but not before the original effective date. The Company is still evaluating the impact of adopting ASU No. 2014-09 on its financial statements. In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements (Subtopic 205-40), Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (“ASU No. 2014-15”). The amendments in ASU No. 2014-15 require management to evaluate, for each annual and interim reporting period, whether there are conditions or events, considered in the aggregate, that raise substantial doubt about an entity’s ability to continue as a going concern within one year after the date that the financial statements are issued (or are available to be issued when applicable) and, if so, provide related disclosures. ASU No. 2014-15 is effective for annual periods ending after December 15, 2016, and interim periods within annual periods beginning after December 15, 2016. Early adoption is permitted for annual or interim reporting periods for which the financial statements have not previously been issued. The Company does not expect the adoption of ASU No. 2014-15 to have a significant impact on its financial statements. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis (“ASU No. 2015-02”), which amended the existing accounting standards for consolidation under both the variable interest model and the voting model. ASU No. 2015-02 modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities (“VIEs”) or voting interest entities, eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. ASU No. 2015-02 is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments in ASU No. 2015-02 using: (a) a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption; or (b) by applying the amendments retrospectively. On January 1, 2016, the Company adopted ASU No. 2015-02 and re-evaluated its consolidation analysis of its joint ventures, concluding that such adoption did not result in (a) the classification of any entities as VIEs, (b) a consolidation of entities not previously consolidated or (c) a deconsolidation of entities previously consolidated. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU No. 2016-01”). The amendments in ASU No. 2016-01 address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU No. 2016-01 primarily affects accounting for equity investments and financial liabilities where the fair value option has been elected. ASU No. 2016-01 also requires entities to present financial assets and financial liabilities separately, grouped by measurement category and form of financial asset in the balance sheet or in the accompanying notes to the financial statements. ASU No. 2016-01 is effective for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early application is permitted for financial statements that have not been previously issued. The Company does not expect the adoption of ASU No. 2016-01 to have a significant impact on its financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU No. 2016-02”). The amendments in ASU No. 2016-02 change the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU No. 2016-02 is effective for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption of ASU No. 2016-02 is permitted. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is currently evaluating the impact of adopting the new leases standard on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) (“ASU No. 2016-13”). ASU No. 2016-13 affects entities holding financial assets and net investments in leases that are not accounted for at fair value through net income. The amendments in ASU No. 2016-13 require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. ASU No. 2016-13 also amends the impairment model for available-for-sale securities. An entity will recognize an allowance for credit losses on available-for-sale debt securities as a contra-account to the amortized cost basis rather than as a direct reduction of the amortized cost basis of the investment, as is currently required. ASU No. 2016-13 also requires new disclosures. For financial assets measured at amortized cost, an entity will be required to disclose information about how it developed its allowance for credit losses, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. For financing receivables and net investments in leases measured at amortized cost, an entity will be required to further disaggregate the information it currently discloses about the credit quality of these assets by year of the asset’s origination for as many as five annual periods. For available for sale securities, an entity will be required to provide a roll-forward of the allowance for credit losses and an aging analysis for securities that are past due. ASU No. 2016-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is still evaluating the impact of adopting ASU No. 2016-13 on its financial statements, but does not expect the adoption of ASU No. 2016-13 to have a material impact on its financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments (“ASU No. 2016-15”). ASU No. 2016-15 is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in ASU No. 2016-15 provide guidance on eight specific cash flow issues, including the following that are or may be relevant to the Company: (a) Cash payments for debt prepayment or debt extinguishment costs should be classified as cash outflows for financing activities; (b) Cash payments relating to contingent consideration made soon after an acquisition’s consummation date (i.e., approximately three months or less) should be classified as cash outflows for investing activities. Payments made thereafter should be classified as cash outflows for financing activities up to the amount of the original contingent consideration liability. Payments made in excess of the amount of the original contingent consideration liability should be classified as cash outflows for operating activities; (c) Cash payments received from the settlement of insurance claims should be classified on the basis of the nature of the loss (or each component loss, if an entity receives a lump-sum settlement); (d) Relating to distributions received from equity method investments, ASU No. 2016-15 provides an accounting policy election for classifying distributions received from equity method investments. Such amounts can be classified using a (1) cumulative earnings approach, or (2) nature of distribution approach. Under the cumulative earnings approach, an investor would compare the distributions received to its cumulative equity method earnings since inception. Any distributions received up to the amount of cumulative equity earnings would be considered a return on investment and classified in operating activities. Any excess distributions would be considered a return of investment and classified in investing activities. Alternatively, an investor can choose to classify the distributions based on the nature of activities of the investee that generated the distribution. If the necessary information is subsequently not available for an investee to determine the nature of the activities, the entity should use the cumulative earnings approach for that investee and report a change in accounting principle on a retrospective basis; (e) In the absence of specific guidance, an entity should classify each separately identifiable cash source and use on the basis of the nature of the underlying cash flows. For cash flows with aspects of more than one class that cannot be separated, the classification should be based on the activity that is likely to be the predominant source or use of cash flow. ASU No. 2016-15 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company is still evaluating the impact of adopting ASU No. 2016-15 on its financial statements, but does not expect the adoption of ASU No. 2016-15 to have a material impact on its financial statements.

REAL ESTATE HELD FOR INVESTME23

REAL ESTATE HELD FOR INVESTMENT (Tables)	9 Months Ended
	Sep. 30, 2016
Real Estate [Abstract]
Schedule of Real Estate Investments	The following table summarizes the Company’s real estate held for investment as of September 30, 2016 and December 31, 2015 , respectively (in thousands): September 30, 2016 December 31, 2015 Land $ 321,226 $ 223,201 Buildings and improvements 849,496 646,979 Tenant origination and absorption costs 52,297 43,894 Total real estate, cost 1,223,019 914,074 Accumulated depreciation and amortization (113,594 ) (91,560 ) Total real estate, net $ 1,109,425 $ 822,514 The following table provides summary information regarding the Company’s real estate held for investment as of September 30, 2016 (in thousands): Property Date Acquired or Foreclosed on City State Property Type Land Building and Improvements Tenant Origination and Absorption Costs Total Real Estate at Cost Accumulated Depreciation and Amortization Total Real Estate, Net Ownership % Northridge Center I & II 03/25/2011 Atlanta GA Office $ 2,234 $ 7,477 $ — $ 9,711 $ (2,309 ) $ 7,402 100.0 % Iron Point Business Park 06/21/2011 Folsom CA Office 2,671 19,629 — 22,300 (4,707 ) 17,593 100.0 % Richardson Portfolio: Palisades Central I 11/23/2011 Richardson TX Office 1,037 10,268 657 11,962 (2,463 ) 9,499 90.0 % Palisades Central II 11/23/2011 Richardson TX Office 810 18,066 749 19,625 (4,806 ) 14,819 90.0 % Greenway I 11/23/2011 Richardson TX Office 561 2,287 — 2,848 (631 ) 2,217 90.0 % Greenway III 11/23/2011 Richardson TX Office 702 3,698 559 4,959 (1,399 ) 3,560 90.0 % Undeveloped Land 11/23/2011 Richardson TX Undeveloped Land 3,134 — — 3,134 — 3,134 90.0 % Total Richardson Portfolio 6,244 34,319 1,965 42,528 (9,299 ) 33,229 Park Highlands (1) 12/30/2011 North Las Vegas NV Undeveloped Land 33,284 — — 33,284 — 33,284 (1) Bellevue Technology Center 07/31/2012 Bellevue WA Office 25,506 56,647 3,813 85,966 (10,480 ) 75,486 100.0 % Powers Ferry Landing East 09/24/2012 Atlanta GA Office 1,643 8,016 99 9,758 (2,185 ) 7,573 100.0 % 1800 West Loop 12/04/2012 Houston TX Office 8,360 60,546 5,079 73,985 (12,623 ) 61,362 100.0 % West Loop I & II 12/07/2012 Houston TX Office 7,300 31,535 1,864 40,699 (5,439 ) 35,260 100.0 % Burbank Collection 12/12/2012 Burbank CA Retail 4,175 10,229 725 15,129 (1,591 ) 13,538 90.0 % Austin Suburban Portfolio 03/28/2013 Austin TX Office 8,288 68,990 2,709 79,987 (11,239 ) 68,748 100.0 % Westmoor Center 06/12/2013 Westminster CO Office 10,058 65,240 5,671 80,969 (11,881 ) 69,088 100.0 % Central Building 07/10/2013 Seattle WA Office 7,015 26,942 1,914 35,871 (4,141 ) 31,730 100.0 % 50 Congress Street 07/11/2013 Boston MA Office 9,876 41,090 2,439 53,405 (6,255 ) 47,150 100.0 % 1180 Raymond 08/20/2013 Newark NJ Apartment 8,292 37,445 136 45,873 (3,730 ) 42,143 100.0 % Park Highlands II (2) 12/10/2013 North Las Vegas NV Undeveloped Land 23,065 — — 23,065 — 23,065 100.0 % Maitland Promenade II 12/18/2013 Orlando FL Office 3,434 24,995 3,757 32,186 (4,585 ) 27,601 100.0 % Plaza Buildings 01/14/2014 Bellevue WA Office 53,040 138,468 7,523 199,031 (17,065 ) 181,966 100.0 % 424 Bedford 01/31/2014 Brooklyn NY Apartment 8,860 25,408 — 34,268 (1,862 ) 32,406 90.0 % Richardson Land II 09/04/2014 Richardson TX Undeveloped Land 3,422 — — 3,422 — 3,422 90.0 % Westpark Portfolio 05/10/2016 Redmond WA Office/Flex/Industrial 36,085 82,355 8,913 127,353 (2,805 ) 124,548 100.0 % 353 Sacramento 07/11/2016 San Francisco CA Office 58,374 110,165 5,690 174,229 (1,398 ) 172,831 100.0 % $ 321,226 $ 849,496 $ 52,297 $ 1,223,019 $ (113,594 ) $ 1,109,425 _____________________ (1) On March 18, 2016, the Company increased its membership interest in the Park Highlands joint venture from 50.1% to 51.58% by acquiring an additional 1.48% membership interest from one of the joint venture partners. On June 6, 2016, the Company increased its membership interest in the Park Highlands joint venture from 51.58% to 97.62% by acquiring an additional 46.04% membership interest from one of the joint venture partners. On June 25, 2016, the Company increased its membership interest in the Park Highlands joint venture from 97.62% to 100% by acquiring the remaining 2.38% membership interest from the remaining joint venture partner. On September 7, 2016, a subsidiary of the Company that owns a portion of Park Highlands, sold 820 units of 10% Class A non-voting preferred membership units for $0.8 million to accredited investors. The amount of the Class A non-voting preferred membership units raised, net of offering costs, is included in other liabilities on the accompanying consolidated balance sheets. (2) On March 18, 2016, the Company increased its membership interest in the Park Highlands II joint venture from 99.5% to 100% by acquiring the remaining 0.5% membership interest from its joint venture partner.
Schedule of Future Minimum Rental Income for Company's Properties	As of September 30, 2016 , the future minimum rental income from the Company’s properties, excluding apartment leases, under non-cancelable operating leases was as follows (in thousands): October 1, 2016 through December 31, 2016 $ 24,511 2017 97,632 2018 82,183 2019 66,784 2020 51,453 Thereafter 114,798 $ 437,361
Schedules of Concentration of Risk, by Risk Factor	As of September 30, 2016 , the Company’s commercial real estate properties were leased to approximately 600 tenants over a diverse range of industries and geographic areas. The Company’s highest tenant industry concentrations (greater than 10% of annualized base rent) were as follows: Industry Number of Tenants Annualized Base Rent (1) (in thousands) Percentage of Annualized Base Rent Computer System Design & Programming 56 $ 11,502 11.0 % Finance 55 11,236 10.7 % $ 22,738 21.7 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2016 , adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term.

TENANT ORIGINATION AND ABSORP24

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2016
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities	As of September 30, 2016 and December 31, 2015 , the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities (excluding fully amortized assets and liabilities and accumulated amortization) were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities September 30, December 31, September 30, December 31, September 30, December 31, Cost $ 52,297 $ 43,894 $ 2,302 $ 2,399 $ (11,463 ) $ (5,826 ) Accumulated Amortization (24,236 ) (22,749 ) (1,569 ) (1,361 ) 3,857 3,091 Net Amount $ 28,061 $ 21,145 $ 733 $ 1,038 $ (7,606 ) $ (2,735 )
Amortization of Tenant Origination and Absorption Costs, Above-Market Leases and Below-Market Lease Liabilities	Increases (decreases) in net income as a result of amortization of the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities for the three and nine months ended September 30, 2016 and 2015 were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Three Months Ended For the Three Months Ended For the Three Months Ended 2016 2015 2016 2015 2016 2015 Amortization $ (3,068 ) $ (2,617 ) $ (119 ) $ (189 ) $ 1,045 $ 382 Tenant Origination and Above-Market Below-Market For the Nine Months Ended For the Nine Months Ended For the Nine Months Ended 2016 2015 2016 2015 2016 2015 Amortization $ (7,765 ) $ (8,256 ) $ (359 ) $ (720 ) $ 1,734 $ 1,321

REAL ESTATE LOAN RECEIVABLE (Ta

REAL ESTATE LOAN RECEIVABLE (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Schedule of Real Estate Loans Receivable	The information for that real estate loan receivable as of September 30, 2016 and December 31, 2015 is set forth below (in thousands): Loan Name Location of Related Property or Collateral Date Originated Property Type Loan Type Outstanding Principal Balance as of September 30, 2016 Book Value as of September 30, 2016 Book Value as of December 31, 2015 (1) Contractual Interest Rate Annualized Effective Interest Rate Maturity Date University House First Mortgage New York, New York 3/20/2013 Student Housing Mortgage $ — $ — $ 27,850 (2) (2) (2) _____________________ (1) Book value of the real estate loan receivable represents outstanding principal balance adjusted for unamortized acquisition discounts, origination fees and direct origination and acquisition costs and additional interest accretion. (2) See below for additional discussion of the University House First Mortgage.
Schedule of Interest Income from Real Estate Loans Receivable	For the three and nine months ended September 30, 2016 and 2015, interest income from the real estate loan receivable consisted of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Contractual interest income $ — $ — $ 3,655 $ 1,540 Accretion of closing costs, origination fees and extension fees, net — — — 428 Interest income from real estate loan receivable $ — $ — $ 3,655 $ 1,968

REAL ESTATE SALES (Tables)

REAL ESTATE SALES (Tables)	9 Months Ended
	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Revenue and Expenses of Real Estate Held-for-Sale	The following table summarizes certain revenue and expenses related to these properties for the three and nine months ended September 30, 2016 , and 2015 (in thousands): Three Months Ended Nine Months Ended September 30, 2016 2015 2016 2015 Total revenues $ — $ — $ — $ 216 Total expenses (2 ) 71 15 636

NOTES AND BONDS PAYABLE (Tables

NOTES AND BONDS PAYABLE (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	As of September 30, 2016 and December 31, 2015 , the Company’s notes and bonds payable consisted of the following (dollars in thousands): Book Value as of Book Value as of Contractual Interest Rate as of September 30, 2016 (1) Effective Interest Rate at (1) Payment Type Maturity Date (2) Richardson Portfolio Mortgage Loan $ 40,746 $ 41,177 One-Month LIBOR + 2.10% 2.62% Principal 05/01/2017 Bellevue Technology Center Mortgage Loan 59,580 52,960 One-Month LIBOR + 2.25% 2.77% Principal 03/01/2017 Portfolio Revolving Loan Facility (3) 75,541 47,087 One-Month LIBOR + 2.25% 2.77% Principal 05/01/2017 Portfolio Mortgage Loan 106,847 100,032 One-Month LIBOR + 2.25% 2.77% Principal 07/01/2017 Burbank Collection Mortgage Loan 9,208 9,098 One-Month LIBOR + 2.35% 2.91% Interest Only (4) 09/30/2017 50 Congress Mortgage Loan 31,589 28,075 One-Month LIBOR + 1.90% 2.42% Interest Only (4) 10/01/2017 1180 Raymond Bond Payable 6,675 6,795 6.50% 6.50% Principal 09/01/2036 Central Building Mortgage Loan 27,600 24,896 One-Month LIBOR + 1.75% 2.27% Interest Only 11/13/2018 Maitland Promenade II Mortgage Loan (5) 19,922 20,182 One-Month LIBOR + 2.90% 3.42% Principal 01/01/2017 Westmoor Center Mortgage Loan 62,000 56,036 One-Month LIBOR + 2.25% 2.77% Interest Only (4) 02/01/2018 Plaza Buildings Senior Loan 110,182 111,000 One-Month LIBOR + 1.90% 2.42% Principal 01/14/2017 424 Bedford Mortgage Loan 24,966 25,358 3.91% 3.91% Principal 10/01/2022 1180 Raymond Mortgage Loan 31,000 28,100 One-Month LIBOR + 2.25% 2.77% Interest Only 12/01/2017 KBS SOR (BVI) Holdings, Ltd. Series A Debentures (6) 258,976 — 4.25% 4.25% (6) 03/01/2023 Westpark Portfolio Mortgage Loan (7) 83,200 — One-Month LIBOR + 2.50% 3.02% Interest Only (4) 07/01/2020 Total Notes and Bonds Payable principal outstanding 948,032 550,796 Net Premium/Discount on Notes and Bonds Payable (8) 78 50 Deferred financing costs, net (11,778 ) (3,523 ) Total Notes and Bonds Payable, net $ 936,332 $ 547,323 _____________________ (1) Contractual interest rate represents the interest rate in effect under the loan as of September 30, 2016 . Effective interest rate is calculated as the actual interest rate in effect as of September 30, 2016 (consisting of the contractual interest rate and contractual floor rates), using interest rate indices at September 30, 2016 , where applicable. (2) Represents the initial maturity date or the maturity date as extended as of September 30, 2016 ; subject to certain conditions, the maturity dates of certain loans may be extended beyond the date shown. (3) The Portfolio Revolving Loan Facility is secured by the 1800 West Loop Building and the Iron Point Business Park. The Portfolio Revolving Loan Facility is comprised of $63.5 million of revolving debt and $12.6 million of non-revolving debt available to be used for tenant improvements, leasing commissions and capital improvements, subject to certain terms and conditions contained in the loan documents. As of September 30, 2016 , $63.5 million of revolving debt and $12.0 million of non-revolving debt had been disbursed to the Company and $ 0.6 million of non-revolving debt is available for future disbursements, subject to certain conditions contained in the loan documents. (4) Represents the payment type required under the loan as of September 30, 2016 . Certain future monthly payments due under this loan also include amortizing principal payments. For more information of the Company’s contractual obligations under its notes and bonds payable, see five-year maturity table below. (5) Interest on the Maitland Promenade II Mortgage Loan is calculated at a variable annual rate of 290 basis points over one-month LIBOR, but at no point shall the interest rate be less than 3.25% . (6) See “– Recent Financing Transactions – Israeli Bond Financing” below. (7) See “– Recent Financing Transactions – Westpark Portfolio Mortgage Loan” below. (8) Represents the unamortized premium/discount on notes and bonds payable due to the above- and below-market interest rates when the debt was assumed. The discount/premium is amortized over the remaining life of the notes and bonds payable.
Schedule of Maturities of Long-term Debt	The following is a schedule of maturities, including principal amortization payments, for all notes and bonds payable outstanding as of September 30, 2016 (in thousands): October 1, 2016 through December 31, 2016 $ 1,598 2017 484,509 2018 90,244 2019 53,686 2020 134,311 Thereafter 183,684 $ 948,032

DERIVATIVE INSTRUMENTS (Tables)

DERIVATIVE INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional and Fair Value of Interest Rate Swaps Designated as Cash Flow Hedges	The following table summarizes the notional amount and other information related to the Company’s foreign currency collars as of September 30, 2016. The notional amount is an indication of the extent of the Company’s involvement in each instrument at that time, but does not represent exposure to credit, interest rate or market risks (currency in thousands): Derivative Instruments Notional Amount Strike Price Trade Date Maturity Date Derivative instruments not designated as hedging instruments Foreign currency collar $ 100,000 3.72 - 3.83 ILS-USD 08/08/2016 08/08/2017 Foreign currency collar 50,000 3.67 - 3.77 ILS-USD 08/16/2016 08/16/2017 Foreign currency collar 50,000 3.68 - 3.78 ILS-USD 08/16/2016 08/16/2017 Foreign currency collar 50,000 3.67 - 3.77 ILS-USD 08/22/2016 08/22/2017 $ 250,000
Schedule of Derivative Instruments in Statement of Financial Position	The following table sets forth the fair value of the Company’s derivative instruments as well as their classification on the consolidated balance sheets as of September 30, 2016 (dollars in thousands): September 30, 2016 Derivative Instruments Balance Sheet Location Number of Instruments Fair Value Derivative instruments not designated as hedging instruments Foreign currency collars Prepaid expenses and other assets 4 $ 1,527

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Face Value, Carrying Amounts and Fair Value	The following were the face values, carrying amounts and fair values of the Company’s financial instruments as of September 30, 2016 and December 31, 2015 , which carrying amounts do not approximate the fair values (in thousands): September 30, 2016 December 31, 2015 Face Value Carrying Amount Fair Value Face Value Carrying Amount Fair Value Financial assets: Real estate loan receivable $ — $ — $ — $ 27,850 $ 27,850 $ 27,850 Financial liabilities: Notes and bonds payable $ 689,056 $ 686,169 $ 691,413 $ 550,796 $ 547,323 $ 554,007 KBS SOR (BVI) Holdings, Ltd. Series A Debentures $ 258,976 $ 250,163 $ 250,222 $ — $ — $ —
Schedule of Fair Value Measurements, Recurring Basis	As of September 30, 2016, the Company measured the following assets at fair value (in thousands): Fair Value Measurements Using Total Quoted Prices in Active Markets (Level 1) Significant Other Observable (Level 2) Significant Unobservable (Level 3) Recurring Basis: Asset derivatives - foreign currency collars $ 1,527 $ — $ 1,527 $ —

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
Schedule of Related Party Costs	Pursuant to the terms of these agreements, summarized below are the related-party costs incurred by the Company for the three and nine months ended September 30, 2016 and 2015, respectively, and any related amounts payable as of September 30, 2016 and December 31, 2015 (in thousands): Incurred Payable as of Three Months Ended September 30, Nine Months Ended September 30, September 30, December 31, 2016 2015 2016 2015 2016 2015 Expensed Asset management fees $ 2,639 $ 2,112 $ 6,932 $ 6,242 $ — $ — Real estate acquisition fees 1,690 — 2,964 — — — Reimbursable operating expenses (1) 57 39 170 116 51 59 Disposition fees (2) — 78 279 180 — — $ 4,386 $ 2,229 $ 10,345 $ 6,538 $ 51 $ 59 _____________________ (1) The Advisor may seek reimbursement for certain employee costs under the Advisory Agreement. The Company has reimbursed the Advisor for the Company’s allocable portion of the salaries, benefits and overhead of internal audit department personnel providing services to the Company. These amounts totaled $ 30,000 and $ 36,000 for the three months ended September 30, 2016 and 2015 , respectively and $114,000 and $98,000 for the nine months ended September 30, 2016 and 2015, respectively, and were the only employee costs reimbursed under the Advisory Agreement during these periods. The Company will not reimburse for employee costs in connection with services for which the Advisor earns acquisition, origination or disposition fees (other than reimbursement of travel and communication expenses) or for the salaries or benefits the Advisor or its affiliates may pay to the Company’s executive officers. In addition to the amounts above, the Company reimburses the Advisor for certain of the Company’s direct costs incurred from third parties that were initially paid by the Advisor on behalf of the Company. (2) Disposition fees with respect to real estate sold are included in the gain on sale of real estate in the accompanying consolidated statements of operations. Disposition fees with respect to the assignment of the Company's real estate loan receivable are included in general and administrative expenses in the accompanying consolidated statements of operations.

INVESTMENT IN UNCONSOLIDATED 31

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Tables)	9 Months Ended
	Sep. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Investments in Unconsolidated Joint Ventures	Summarized financial information for the 110 William Joint Venture follows (in thousands): September 30, 2016 December 31, 2015 Assets: Real estate assets, net of accumulated depreciation and amortization $ 264,342 $ 269,664 Other assets 23,251 18,973 Total assets $ 287,593 $ 288,637 Liabilities and Equity: Notes payable, net (1) $ 158,845 $ 162,395 Other liabilities 13,269 13,617 Partners’ capital 115,479 112,625 Total Liabilities and Equity $ 287,593 $ 288,637 _____________________ (1) Includes (i) a first mortgage loan with an outstanding principal balance of $136.9 million and $138.6 million as of September 30, 2016 and December 31, 2015 , respectively, bearing interest at a fixed rate of 4.8% per annum and maturing on July 6, 2017 and (ii) a mezzanine loan with an outstanding principal balance of $20.0 million as of September 30, 2016 and December 31, 2015 bearing interest at a fixed rate of 9.5% per annum and maturing on July 6, 2017. The amount presented includes a premium on notes payable of $2.3 million and $4.5 million as of September 30, 2016 and December 31, 2015 , respectively and deferred financing costs, net of $0.3 million and $0.7 million as of September 30, 2016 and December 31, 2015, respectively. Three Months Ended Nine Months Ended 2016 2015 2016 2015 Revenues $ 8,461 $ 9,214 $ 25,100 $ 25,911 Expenses: Operating, maintenance, and management 3,162 2,569 8,120 8,056 Real estate taxes and insurance 1,535 1,642 4,502 4,329 Depreciation and amortization 3,563 3,194 9,831 9,476 Interest expense 1,517 1,552 4,541 4,627 Total expenses 9,777 8,957 26,994 26,488 Other income 16 11 48 319 Net (loss) income $ (1,300 ) $ 268 $ (1,846 ) $ (258 ) Company’s equity in (loss) income of unconsolidated joint venture $ (791 ) $ 150 $ (1,139 ) $ (186 ) As of September 30, 2016 and December 31, 2015 , the Company’s investments in unconsolidated joint ventures were composed of the following (dollars in thousands): Investment Balance at Joint Venture Number of Properties Location Ownership % September 30, 2016 December 31, 2015 NIP Joint Venture 21 Various Less than 5.0% $ 5,305 $ 5,305 110 William Joint Venture 1 New York, New York 60.0% 70,813 69,132 $ 76,118 $ 74,437

UNAUDITED PRO FORMA FINANCIAL32

UNAUDITED PRO FORMA FINANCIAL INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2016
Business Acquisition, Pro Forma Information [Abstract]
Business Acquisition, Pro Forma Information	The following unaudited pro forma information for the three and nine months ended September 30, 2016 and 2015 has been prepared to give effect to the acquisition of the Westpark Portfolio and 353 Sacramento as if the acquisitions occurred on January 1, 2015. This pro forma information does not purport to represent what the actual results of operations of the Company would have been had the acquisitions occurred on this date, nor does it purport to predict the results of operations for future periods (in thousands). For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Revenues $ 36,478 $ 33,779 $ 108,795 $ 101,632 Depreciation and amortization $ 14,472 $ 13,582 $ 41,989 $ 40,539 Net (loss) income $ (12,990 ) $ (119 ) $ (18,101 ) $ 8,221

ORGANIZATION (Details)

ORGANIZATION (Details) $ in Thousands	Mar. 07, 2016ILS (₪)	Mar. 02, 2016ILS (₪)	Mar. 01, 2016ILS (₪)	Mar. 31, 2016USD ($)	Mar. 31, 2016ILS (₪)	Sep. 30, 2016USD ($)aportfoliopropertyinvestmentshares	Dec. 31, 2015USD ($)shares	Sep. 30, 2015USD ($)shares	Sep. 30, 2016USD ($)aportfoliopropertyinvestmentshares	Dec. 18, 2015shares	Oct. 23, 2012USD ($)shares	Dec. 29, 2011USD ($)shares	Jan. 08, 2009shares
Organizational Structure [Line Items]
Common stock, shares authorized						1,000,000,000	1,000,000,000		1,000,000,000
Partnership interest in Operating Partnership						0.10%
Partnership interest in the Operating Partnership and is its sole limited partner						99.90%
Issuance of common stock, value | $						$ 9,520	$ 13,573	$ 561,700
Shares of common stock sold under dividend reinvestment plan, value | $									$ 62,300
Redemptions of common stock, value | $						$ 31,454	$ 30,100		$ 69,900
Common stock, shares issued						57,050,299	58,696,115		57,050,299		55,249	220,994
Common stock, value, issued | $						$ 571	$ 587		$ 571		$ 500	$ 2,000
Real estate area of undeveloped land | a						1,670			1,670
Number of Investments in Unconsolidated Joint Venture | investment						2			2
Office Properties [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						11			11
Office Campus [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						1			1
Office Portfolio [Member]
Organizational Structure [Line Items]
Number of real estate properties | portfolio						1			1
Office Portfolio [Member] | Austin Suburban Portfolio [Member]
Organizational Structure [Line Items]
Number of real estate properties | portfolio						1			1
Office Buildings, Portfolio [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						4			4
Real estate area of undeveloped land | a						25			25
Office Property, Portfolio [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						9			9
Office Property, Portfolio [Member] | Austin Suburban Portfolio [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						3			3
Office/Flex/Industrial Portfolio [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						1			1
Office/Flex/Industrial Buildings [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						21			21
Retail Properties [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						1			1
Apartment Property [Member]
Organizational Structure [Line Items]
Number of real estate properties | property						2			2
Undeveloped Land [Member]
Organizational Structure [Line Items]
Number of investments in real estate properties | property						2			2
Series A Debentures [Member] | Bonds Payable [Member]
Organizational Structure [Line Items]
Maximum borrowing capacity | ₪		₪ 1,000,000,000
Interest rate during period				4.25%	4.25%
Proceeds from issuance of debt	₪ 127,700,000		₪ 842,500,000	$ 259,000	₪ 970,200,000
Principal installment payments required as percent of total debt		20.00%
Common Stock [Member]
Organizational Structure [Line Items]
Shares registered in primary offering													100,000,000
Shares registered for sale under dividend reinvestment plan													40,000,000
Issuance of common stock, shares						708,327	1,114,532	56,584,976
Issuance of common stock, value | $						$ 7	$ 11
Shares of common stock sold under dividend reinvestment plan, shares									5,804,835
Redemptions of common stock, shares						2,354,143	2,462,746		5,635,755
Redemptions of common stock, value | $						$ 23	$ 24
Minimum [Member] | Common Stock [Member]
Organizational Structure [Line Items]
Stock offering, shares authorized for issuance													250,000
Maximum [Member] | Series A Debentures [Member] | Bonds Payable [Member]
Organizational Structure [Line Items]
Interest rate during period		4.25%
Maximum [Member] | Common Stock [Member]
Organizational Structure [Line Items]
Stock offering, shares authorized for issuance													140,000,000
KBS Strategic Opportunity BVI [Member]
Organizational Structure [Line Items]
Common stock, shares authorized										50,000
KBS Strategic Opportunity BVI [Member] | Operating Partnership [Member]
Organizational Structure [Line Items]
Common stock, shares issued										10,000
KBS Capital Advisors LLC [Member]
Organizational Structure [Line Items]
Shares held by affiliate						20,000			20,000

SUMMARY OF SIGNIFICANT ACCOUN34

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016$ / shares	Sep. 30, 2015$ / shares	Sep. 30, 2016segment$ / shares	Sep. 30, 2015$ / shares
Accounting Policies [Abstract]
Number of reportable segments | segment			1
Distributions declared per share (in dollars per share) | $ / shares	$ 0.094	$ 0.095	$ 0.280	$ 0.280

REAL ESTATE HELD FOR INVESTME35

REAL ESTATE HELD FOR INVESTMENT (Narrative) (Details) ft² in Millions	Sep. 30, 2016aft²portfoliounitpropertyinvestment
Real Estate Properties [Line Items]
Real estate area of undeveloped land | a	1,670
Rentable square feet | ft²	5.5
Percentage of portfolio occupied	87.00%
Office Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	11
Office Campus [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1
Office Portfolio [Member]
Real Estate Properties [Line Items]
Number of real estate properties | portfolio	1
Office Portfolio [Member] | Austin Suburban Portfolio [Member]
Real Estate Properties [Line Items]
Number of real estate properties | portfolio	1
Office Buildings, Portfolio [Member]
Real Estate Properties [Line Items]
Number of real estate properties	4
Real estate area of undeveloped land | a	25
Office Property, Portfolio [Member]
Real Estate Properties [Line Items]
Number of real estate properties	9
Office Property, Portfolio [Member] | Austin Suburban Portfolio [Member]
Real Estate Properties [Line Items]
Number of real estate properties	3
Office/Flex/Industrial Portfolio [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1
Office/Flex/Industrial Buildings [Member]
Real Estate Properties [Line Items]
Number of real estate properties	21
Retail Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1
Apartment Property [Member]
Real Estate Properties [Line Items]
Number of real estate properties	2
Rentable square feet | ft²	0.3
Percentage of portfolio occupied	90.00%
Apartment Property [Member] | 1180 Raymond [Member] | Multifamily Tower [Member]
Real Estate Properties [Line Items]
Number of units in real estate property | unit	383
Undeveloped Land [Member]
Real Estate Properties [Line Items]
Number of investments in real estate | investment	2

REAL ESTATE HELD FOR INVESTME36

REAL ESTATE HELD FOR INVESTMENT (Schedule of Real Estate Investments) (Details) $ in Thousands	Sep. 07, 2016USD ($)unit	Jun. 25, 2016	Jun. 06, 2016	Jun. 05, 2016	Mar. 18, 2016	Mar. 17, 2016	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Real Estate Properties [Line Items]
Total real estate, cost							$ 1,223,019	$ 914,074
Accumulated depreciation and amortization							(113,594)	(91,560)
Total real estate, net							1,109,425	822,514
Subsidiary of Common Parent [Member]
Real Estate Properties [Line Items]
Interest rate on Class A non-voting preferred membership units	10.00%
Proceeds from sale of units	$ 800
Subsidiary of Common Parent [Member] | Disposed of by Sale [Member]
Real Estate Properties [Line Items]
Number of real estate units | unit	820
Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							321,226	223,201
Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							849,496	646,979
Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 52,297	$ 43,894
Northridge Center I & II [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Mar. 25, 2011
Total real estate, cost							$ 9,711
Accumulated depreciation and amortization							(2,309)
Total real estate, net							$ 7,402
Ownership %							100.00%
Northridge Center I & II [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 2,234
Northridge Center I & II [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							7,477
Northridge Center I & II [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Iron Point Business Park [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jun. 21, 2011
Total real estate, cost							$ 22,300
Accumulated depreciation and amortization							(4,707)
Total real estate, net							$ 17,593
Ownership %							100.00%
Iron Point Business Park [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 2,671
Iron Point Business Park [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							19,629
Iron Point Business Park [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Palisades Central I [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Nov. 23, 2011
Total real estate, cost							$ 11,962
Accumulated depreciation and amortization							(2,463)
Total real estate, net							$ 9,499
Ownership %							90.00%
Palisades Central I [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 1,037
Palisades Central I [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							10,268
Palisades Central I [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 657
Palisades Central II [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Nov. 23, 2011
Total real estate, cost							$ 19,625
Accumulated depreciation and amortization							(4,806)
Total real estate, net							$ 14,819
Ownership %							90.00%
Palisades Central II [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 810
Palisades Central II [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							18,066
Palisades Central II [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 749
Greenway I [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Nov. 23, 2011
Total real estate, cost							$ 2,848
Accumulated depreciation and amortization							(631)
Total real estate, net							$ 2,217
Ownership %							90.00%
Greenway I [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 561
Greenway I [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							2,287
Greenway I [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Greenway III [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Nov. 23, 2011
Total real estate, cost							$ 4,959
Accumulated depreciation and amortization							(1,399)
Total real estate, net							$ 3,560
Ownership %							90.00%
Greenway III [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 702
Greenway III [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							3,698
Greenway III [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 559
Undeveloped Land [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Nov. 23, 2011
Total real estate, cost							$ 3,134
Accumulated depreciation and amortization							0
Total real estate, net							$ 3,134
Ownership %							90.00%
Undeveloped Land [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 3,134
Undeveloped Land [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							0
Undeveloped Land [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							0
Richardson Portfolio [Member]
Real Estate Properties [Line Items]
Total real estate, cost							42,528
Accumulated depreciation and amortization							(9,299)
Total real estate, net							33,229
Richardson Portfolio [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							6,244
Richardson Portfolio [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							34,319
Richardson Portfolio [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 1,965
Park Highlands [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Dec. 30, 2011
Total real estate, cost							$ 33,284
Accumulated depreciation and amortization							0
Total real estate, net							33,284
Ownership %		100.00%	97.62%	51.58%	51.58%	50.10%
Increase in percentage ownership		2.38%	46.04%		1.48%
Park Highlands [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							33,284
Park Highlands [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							0
Park Highlands [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Bellevue Technology Center [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jul. 31, 2012
Total real estate, cost							$ 85,966
Accumulated depreciation and amortization							(10,480)
Total real estate, net							$ 75,486
Ownership %							100.00%
Bellevue Technology Center [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 25,506
Bellevue Technology Center [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							56,647
Bellevue Technology Center [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 3,813
Powers Ferry Landing East [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Sep. 24, 2012
Total real estate, cost							$ 9,758
Accumulated depreciation and amortization							(2,185)
Total real estate, net							$ 7,573
Ownership %							100.00%
Powers Ferry Landing East [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 1,643
Powers Ferry Landing East [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							8,016
Powers Ferry Landing East [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 99
1800 West Loop [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Dec. 4, 2012
Total real estate, cost							$ 73,985
Accumulated depreciation and amortization							(12,623)
Total real estate, net							$ 61,362
Ownership %							100.00%
1800 West Loop [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 8,360
1800 West Loop [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							60,546
1800 West Loop [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 5,079
West Loop I and II [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Dec. 7, 2012
Total real estate, cost							$ 40,699
Accumulated depreciation and amortization							(5,439)
Total real estate, net							$ 35,260
Ownership %							100.00%
West Loop I and II [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 7,300
West Loop I and II [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							31,535
West Loop I and II [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 1,864
Burbank Collection [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Dec. 12, 2012
Total real estate, cost							$ 15,129
Accumulated depreciation and amortization							(1,591)
Total real estate, net							$ 13,538
Ownership %							90.00%
Burbank Collection [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 4,175
Burbank Collection [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							10,229
Burbank Collection [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 725
Austin Suburban Portfolio [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Mar. 28, 2013
Total real estate, cost							$ 79,987
Accumulated depreciation and amortization							(11,239)
Total real estate, net							$ 68,748
Ownership %							100.00%
Austin Suburban Portfolio [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 8,288
Austin Suburban Portfolio [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							68,990
Austin Suburban Portfolio [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 2,709
Westmoor Center [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jun. 12, 2013
Total real estate, cost							$ 80,969
Accumulated depreciation and amortization							(11,881)
Total real estate, net							$ 69,088
Ownership %							100.00%
Westmoor Center [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 10,058
Westmoor Center [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							65,240
Westmoor Center [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 5,671
Central Building [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jul. 10, 2013
Total real estate, cost							$ 35,871
Accumulated depreciation and amortization							(4,141)
Total real estate, net							$ 31,730
Ownership %							100.00%
Central Building [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 7,015
Central Building [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							26,942
Central Building [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 1,914
50 Congress Street [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jul. 11, 2013
Total real estate, cost							$ 53,405
Accumulated depreciation and amortization							(6,255)
Total real estate, net							$ 47,150
Ownership %							100.00%
50 Congress Street [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 9,876
50 Congress Street [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							41,090
50 Congress Street [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 2,439
1180 Raymond [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Aug. 20, 2013
Total real estate, cost							$ 45,873
Accumulated depreciation and amortization							(3,730)
Total real estate, net							$ 42,143
Ownership %							100.00%
1180 Raymond [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 8,292
1180 Raymond [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							37,445
1180 Raymond [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 136
Park Highlands II [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Dec. 10, 2013
Total real estate, cost							$ 23,065
Accumulated depreciation and amortization							0
Total real estate, net							$ 23,065
Ownership %					100.00%	99.50%	100.00%
Increase in percentage ownership					0.50%
Park Highlands II [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 23,065
Park Highlands II [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							0
Park Highlands II [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Maitland Promenade II [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Dec. 18, 2013
Total real estate, cost							$ 32,186
Accumulated depreciation and amortization							(4,585)
Total real estate, net							$ 27,601
Ownership %							100.00%
Maitland Promenade II [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 3,434
Maitland Promenade II [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							24,995
Maitland Promenade II [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 3,757
Plaza Buildings [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jan. 14, 2014
Total real estate, cost							$ 199,031
Accumulated depreciation and amortization							(17,065)
Total real estate, net							$ 181,966
Ownership %							100.00%
Plaza Buildings [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 53,040
Plaza Buildings [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							138,468
Plaza Buildings [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 7,523
424 Bedford [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jan. 31, 2014
Total real estate, cost							$ 34,268
Accumulated depreciation and amortization							(1,862)
Total real estate, net							$ 32,406
Ownership %							90.00%
424 Bedford [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 8,860
424 Bedford [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							25,408
424 Bedford [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Richardson Land II [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Sep. 4, 2014
Total real estate, cost							$ 3,422
Accumulated depreciation and amortization							0
Total real estate, net							$ 3,422
Ownership %							90.00%
Richardson Land II [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 3,422
Richardson Land II [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							0
Richardson Land II [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 0
Westpark Portfolio [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							May 10, 2016
Total real estate, cost							$ 127,353
Accumulated depreciation and amortization							(2,805)
Total real estate, net							$ 124,548
Ownership %							100.00%
Westpark Portfolio [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 36,085
Westpark Portfolio [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							82,355
Westpark Portfolio [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 8,913
353 Sacramento [Member]
Real Estate Properties [Line Items]
Date Acquired or Foreclosed on							Jul. 11, 2016
Total real estate, cost							$ 174,229
Accumulated depreciation and amortization							(1,398)
Total real estate, net							$ 172,831
Ownership %							100.00%
353 Sacramento [Member] | Land [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 58,374
353 Sacramento [Member] | Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Total real estate, cost							110,165
353 Sacramento [Member] | Tenant Origination and Absorption Costs [Member]
Real Estate Properties [Line Items]
Total real estate, cost							$ 5,690

REAL ESTATE HELD FOR INVESTME37

REAL ESTATE HELD FOR INVESTMENT (Operating Leases) (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)tenant	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Operating Leased Assets [Line Items]
Recognition of Deferred Revenue	$ 2,020	$ 3,708
Deferred rent receivables	25,700		$ 22,800
Incentive to Lessee	$ 3,300		2,800
Number of tenants | tenant	600
Maximum [Member]
Operating Leased Assets [Line Items]
Operating lease, term	11 years 6 months
Weighted Average [Member]
Operating Leased Assets [Line Items]
Operating lease, term	3 years 7 months 6 days
Other Liabilities [Member]
Operating Leased Assets [Line Items]
Security deposit liability	$ 7,200		$ 5,300
Apartment Building [Member]
Operating Leased Assets [Line Items]
Operating lease, term	1 year

REAL ESTATE HELD FOR INVESTME38

REAL ESTATE HELD FOR INVESTMENT (Future Minimum Rental Income) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Real Estate [Abstract]
October 1, 2016 through December 31, 2016	$ 24,511
2,017	97,632
2,018	82,183
2,019	66,784
2,020	51,453
Thereafter	114,798
Future minimum rental income	$ 437,361

REAL ESTATE HELD FOR INVESTME39

REAL ESTATE HELD FOR INVESTMENT (Highest Tenant Industry Concentrations- Greater than 10% of Annual Base Rent) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)tenant
Concentration Risk [Line Items]
Number of tenants | tenant	600
Annualized Base Rent | $	$ 22,738
Percentage of Annualized Base Rent	21.70%
Industry - Computer System Design & Programming [Member]
Concentration Risk [Line Items]
Number of tenants | tenant	56
Annualized Base Rent | $	$ 11,502
Percentage of Annualized Base Rent	11.00%
Industry - Finance [Member]
Concentration Risk [Line Items]
Number of tenants | tenant	55
Annualized Base Rent | $	$ 11,236
Percentage of Annualized Base Rent	10.70%

REAL ESTATE HELD FOR INVESTME40

REAL ESTATE HELD FOR INVESTMENT (Geographic Concentration Risk) (Details)	9 Months Ended
	Sep. 30, 2016
Concentration Risk [Line Items]
Concentration risk, percentage	21.70%
Washington [Member] | Assets, Total [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	31.70%
California [Member] | Assets, Total [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	15.60%
Texas [Member] | Assets, Total [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	15.50%

REAL ESTATE HELD FOR INVESTME41

REAL ESTATE HELD FOR INVESTMENT (Property Damages) (Details) - Damaged Properties [Member]	9 Months Ended
	Sep. 30, 2016USD ($)
Real Estate Properties [Line Items]
Maximum deductible per incident	$ 100,000
Property damages	1,600,000
Estimated insurance recoveries	1,500,000
Aggregate net loss due to damages	$ 100,000

REAL ESTATE HELD FOR INVESTME42

REAL ESTATE HELD FOR INVESTMENT (Acquisitions) (Details) $ in Thousands	Jul. 11, 2016USD ($)aft²property	May 10, 2016USD ($)aft²property	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)property	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			$ 1,223,019		$ 1,223,019		$ 914,074
Above-market leases, net			733		733		1,038
Below-market leases, net			7,606		7,606		2,735
Real estate acquisition fees and expenses			274	$ 0	542	$ 0
Revenues			36,133	28,158	98,365	84,769
Operating expenses			50,356	$ 31,695	119,176	$ 93,136
Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			321,226		321,226		223,201
Buildings and Improvements [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			849,496		849,496		646,979
Tenant Origination and Absorption Costs [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			52,297		52,297		$ 43,894
Westpark Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net rentable area | ft²		778,472
Area of land | a		41
Purchase price		$ 125,800
Above-market leases, net			100		100
Below-market leases, net			600		600
Westpark Portfolio [Member] | Tenant Origination and Absorption Costs [Member] | Weighted Average [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Remaining amortization period		4 years 4 months 24 days
Westpark Portfolio [Member] | Above Market Leases [Member] | Weighted Average [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Remaining amortization period		2 years 8 months 12 days
Westpark Portfolio [Member] | Below-Market Lease Liabilities [Member] | Weighted Average [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Remaining amortization period		3 years 6 months
Westpark Portfolio [Member] | Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			36,100		36,100
Westpark Portfolio [Member] | Buildings and Improvements [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			81,200		81,200
Westpark Portfolio [Member] | Tenant Origination and Absorption Costs [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			9,000		9,000
Westpark Portfolio [Member] | Office/Flex/Industrial Buildings [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties acquired | property		21
353 Sacramento [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net rentable area | ft²	284,751
Area of land | a	0
Purchase price	$ 168,000
Above-market leases, net			6,100		6,100
353 Sacramento [Member] | Tenant Origination and Absorption Costs [Member] | Weighted Average [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Remaining amortization period	3 years 3 months 18 days
353 Sacramento [Member] | Below-Market Lease Liabilities [Member] | Weighted Average [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Remaining amortization period	2 years 7 months 6 days
353 Sacramento [Member] | Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			58,400		58,400
353 Sacramento [Member] | Buildings and Improvements [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			110,000		110,000
353 Sacramento [Member] | Tenant Origination and Absorption Costs [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate, cost			$ 5,700		$ 5,700
353 Sacramento [Member] | Office Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties acquired | property	1				1
Acquisitions of 2016 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate acquisition fees and expenses					$ 3,500
Revenues					8,000
Operating expenses					$ 3,300

TENANT ORIGINATION AND ABSORP43

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
Tenant Origination And Absorption Costs, Cost	$ 52,297		$ 52,297		$ 43,894
Tenant Origination and Absorption Costs, Accumulated Amortization	(24,236)		(24,236)		(22,749)
Tenant Origination and Absorption Costs, Net Amount	28,061		28,061		21,145
Tenant Origination and Absorption Costs, Amortization expense	(3,068)	$ (2,617)	(7,765)	$ (8,256)
Above-Market Lease Assets, Cost	2,302		2,302		2,399
Above-Market Lease Assets, Accumulated Amortization	(1,569)		(1,569)		(1,361)
Above-Market Lease Assets, Net Amount	733		733		1,038
Above-Market Lease Assets, Amortization expense	(119)	(189)	(359)	(720)
Below-Market Lease Liabilities, Cost	(11,463)		(11,463)		(5,826)
Below-Market Lease Liabilities, Accumulated Amortization	3,857		3,857		3,091
Below-Market Lease Liabilities, Net Amount	(7,606)		(7,606)		$ (2,735)
Below-Market Lease Liabilities, Amortization expense	$ 1,045	$ 382	$ 1,734	$ 1,321

TENANT ORIGINATION AND ABSORP44

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Line Items]
Tax abatement asset	$ 6,500		$ 6,500		$ 7,200
Depreciation and amortization	14,337	$ 11,297	37,436	$ 33,684
Property Tax Abatement Intangible Asset [Member]
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Line Items]
Depreciation and amortization	$ 200	$ 200	$ 700	$ 700

REAL ESTATE LOAN RECEIVABLE (Lo

REAL ESTATE LOAN RECEIVABLE (Loans Receivables) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)loans-receivable
Real Estate Properties [Line Items]
Number of real estate loans receivable | loans-receivable		1
Book Value	$ 0	$ 27,850
Mortgages [Member] | University House First Mortgage [Member]
Real Estate Properties [Line Items]
Date Originated	Mar. 20, 2013
Outstanding Principal Balance	$ 0
Book Value	$ 0	$ 27,850

REAL ESTATE LOAN RECEIVABLE (Sc

REAL ESTATE LOAN RECEIVABLE (Schedule of Interest Income from Real Estate Loans Receivable) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Receivables [Abstract]
Contractual interest income	$ 0	$ 0	$ 3,655	$ 1,540
Accretion of closing costs, origination fees and extension fees, net	0	0	0	428
Interest income from real estate loan receivable	$ 0	$ 0	$ 3,655	$ 1,968

REAL ESTATE LOAN RECEIVABLE (Na

REAL ESTATE LOAN RECEIVABLE (Narrative) (Details) - University House First Mortgage [Member] - USD ($) $ in Millions	Apr. 22, 2016	Sep. 30, 2016
Mortgage Loans on Real Estate [Line Items]
Proceeds from notes receivable	$ 31.6
Mortgages [Member]
Mortgage Loans on Real Estate [Line Items]
Outstanding principal balance to be recovered		$ 27.9

REAL ESTATE SALES (Narrative) (

REAL ESTATE SALES (Narrative) (Details) - property	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties classified as held for sale	0
Office Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed		2

REAL ESTATE SALES (Revenue and

REAL ESTATE SALES (Revenue and Expenses for Real Estate Held-for-Sale) (Details) - Disposed of by Sale [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	$ 0	$ 0	$ 0	$ 216
Total expenses	$ (2)	$ 71	$ 15	$ 636

NOTES AND BONDS PAYABLE (Narrat

NOTES AND BONDS PAYABLE (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Interest expense	$ 7,992	$ 3,524	$ 20,354	$ 11,292
Amortization of deferred financing costs	1,100	600	2,908	2,118
Interest capitalized	500	$ 500	1,478	$ 1,476
Deferred finance costs	12,200		12,200		$ 4,700
Interest payable	2,500		2,500		1,200
Notes and Bonds Payable [Member]
Debt Instrument [Line Items]
Deferred finance costs	11,800		11,800		3,500
Prepaid Expenses and Other Current Assets [Member]
Debt Instrument [Line Items]
Deferred finance costs	$ 400		$ 400		$ 1,200

NOTES AND BONDS PAYABLE (Schedu

NOTES AND BONDS PAYABLE (Schedule of Long-term Debt Instruments) (Details) - USD ($)	Jul. 08, 2016	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total Notes and Bonds Payable principal outstanding		$ 948,032,000	$ 550,796,000
Net Premium/Discount on Notes and Bond Payable		78,000	50,000
Deferred financing costs, net		(11,778,000)	(3,523,000)
Total Notes and Bonds Payable, net		$ 936,332,000	547,323,000
One-month LIBOR [Member] | Mortgages [Member] | Richardson Joint Venture [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		4.00%
Richardson Portfolio [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 40,746,000	41,177,000
Interest rate, effective percentage		2.62%
Maturity Date		May 1, 2017
Richardson Portfolio [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.10%
Bellevue Technology Center [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 59,580,000	52,960,000
Interest rate, effective percentage		2.77%
Maturity Date		Mar. 1, 2017
Bellevue Technology Center [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
Portfolio Revolving Loan Facility [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 75,541,000	47,087,000
Interest rate, effective percentage		2.77%
Maturity Date		May 1, 2017
Portfolio Revolving Loan Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 63,500,000
Portfolio Revolving Loan Facility [Member] | Revolving Credit Facility [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Amount outstanding		63,500,000
Portfolio Revolving Loan Facility [Member] | Non-Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		12,600,000
Portfolio Revolving Loan Facility [Member] | Non-Revolving Credit Facility [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Amount outstanding		12,000,000
Unused borrowing capacity, amount		$ 600,000
Portfolio Revolving Loan Facility [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
Portfolio Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 106,847,000	100,032,000
Interest rate, effective percentage		2.77%
Maturity Date		Jul. 1, 2017
Portfolio Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
Burbank Collection Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 9,208,000	9,098,000
Interest rate, effective percentage		2.91%
Maturity Date		Sep. 30, 2017
Burbank Collection Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.35%
50 Congress Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 31,589,000	28,075,000
Interest rate, effective percentage		2.42%
Maturity Date		Oct. 1, 2017
50 Congress Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.90%
1180 Raymond Bond [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Bonds payable		$ 6,675,000	6,795,000
Contractual interest rate, percentage		6.50%
Interest rate, effective percentage		6.50%
Maturity Date		Sep. 1, 2036
Central Building Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 27,600,000	24,896,000
Interest rate, effective percentage		2.27%
Maturity Date		Nov. 13, 2018
Central Building Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Maitland Promenade II Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 19,922,000	20,182,000
Interest rate, effective percentage		3.42%
Maturity Date		Jan. 1, 2017
Maitland Promenade II Mortgage Loan [Member] | Secured Debt [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Interest rate, effective percentage		3.25%
Maitland Promenade II Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.90%
Westmoor Center Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 62,000,000	56,036,000
Interest rate, effective percentage		2.77%
Maturity Date		Feb. 1, 2018
Westmoor Center Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
Plaza Buildings Senior Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 110,182,000	111,000,000
Interest rate, effective percentage		2.42%
Maturity Date		Jan. 14, 2017
Plaza Buildings Senior Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.90%
424 Bedford Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 24,966,000	25,358,000
Contractual interest rate, percentage		3.91%
Interest rate, effective percentage		3.91%
Maturity Date		Oct. 1, 2022
1180 Raymond Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Notes payable		$ 31,000,000	28,100,000
Basis spread on variable rate		2.25%
Interest rate, effective percentage		2.77%
Maturity Date		Dec. 1, 2017
KBS SOR (BVI) Holdings, Ltd. Series A Debentures [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Bonds payable		$ 258,976,000	0
Contractual interest rate, percentage		4.25%
Interest rate, effective percentage		4.25%
Maturity Date		Mar. 1, 2023
Westpark Portfolio Mortgage Loan [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Bonds payable		$ 83,200,000	$ 0
Interest rate, effective percentage		3.02%
Maturity Date		Jul. 1, 2020
Westpark Portfolio Mortgage Loan [Member] | One-month LIBOR [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%	2.50%

NOTES AND BONDS PAYABLE (Sche52

NOTES AND BONDS PAYABLE (Schedule of Maturities of Long-term Debt) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Debt Disclosure [Abstract]
October 1, 2016 through December 31, 2016	$ 1,598
2,017	484,509
2,018	90,244
2,019	53,686
2,020	134,311
Thereafter	183,684
Notes and bond payable outstanding	$ 948,032

NOTES AND BONDS PAYABLE (Israel

NOTES AND BONDS PAYABLE (Israeli Bond Financing) (Details) - Bonds Payable [Member] - Series A Debentures [Member] $ in Millions	Mar. 07, 2016ILS (₪)	Mar. 02, 2016ILS (₪)	Mar. 01, 2016ILS (₪)	Mar. 31, 2016USD ($)	Mar. 31, 2016ILS (₪)	Sep. 30, 2016USD ($)	Sep. 30, 2016ILS (₪)
Debt Instrument [Line Items]
Maximum borrowing capacity | ₪		₪ 1,000,000,000
Interest rate during period				4.25%	4.25%
Proceeds from issuance of debt	₪ 127,700,000		₪ 842,500,000	$ 259	₪ 970,200,000
Principal installment payments required as percent of total debt		20.00%
Payments of debt issuance costs | $				$ 9.8
Funded amount						$ 5.5	₪ 20,800,000
Required expense reserve						$ 0.3	₪ 1,000,000
Maximum [Member]
Debt Instrument [Line Items]
Interest rate during period		4.25%

NOTES AND BONDS PAYABLE NOTES A

NOTES AND BONDS PAYABLE NOTES AND BONDS PAYABLE (Westpark Portfolio Mortgage Loan) (Details) - Westpark Portfolio Mortgage Loan [Member] - Mortgages [Member] - USD ($) $ in Millions	Jul. 08, 2016	Sep. 30, 2016
One-month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%	2.50%
Line of Credit [Member]
Debt Instrument [Line Items]
Term of credit facility	4 years
Maximum borrowing capacity	$ 85.2
Amount outstanding	83.2
Remaining borrowing capacity	$ 2
Extension period	1 year

DERIVATIVE INSTRUMENTS (Notiona

DERIVATIVE INSTRUMENTS (Notional Amount) (Details) - Not Designated as Hedging Instrument [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Foreign Currency Collar [Member]
Derivative [Line Items]
Fair Value	$ 250,000
Foreign Currency Collar 1 [Member]
Derivative [Line Items]
Fair Value	$ 100,000
Maturity Date	Aug. 8, 2017
Foreign Currency Collar 1 [Member] | Minimum [Member]
Derivative [Line Items]
Reference Rate	3.72
Foreign Currency Collar 1 [Member] | Maximum [Member]
Derivative [Line Items]
Reference Rate	3.83
Foreign Currency Collar 2 [Member]
Derivative [Line Items]
Fair Value	$ 50,000
Maturity Date	Aug. 16, 2017
Foreign Currency Collar 2 [Member] | Minimum [Member]
Derivative [Line Items]
Reference Rate	3.67
Foreign Currency Collar 2 [Member] | Maximum [Member]
Derivative [Line Items]
Reference Rate	3.77
Foreign Currency Collar 3 [Member]
Derivative [Line Items]
Fair Value	$ 50,000
Maturity Date	Aug. 16, 2017
Foreign Currency Collar 3 [Member] | Minimum [Member]
Derivative [Line Items]
Reference Rate	3.68
Foreign Currency Collar 3 [Member] | Maximum [Member]
Derivative [Line Items]
Reference Rate	3.78
Foreign Currency Collar 4 [Member]
Derivative [Line Items]
Fair Value	$ 50,000
Maturity Date	Aug. 22, 2017
Foreign Currency Collar 4 [Member] | Minimum [Member]
Derivative [Line Items]
Reference Rate	3.67
Foreign Currency Collar 4 [Member] | Maximum [Member]
Derivative [Line Items]
Reference Rate	3.77

DERIVATIVE INSTRUMENTS (Fair Va

DERIVATIVE INSTRUMENTS (Fair Value) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)investment	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)investment	Sep. 30, 2015USD ($)
Derivative [Line Items]
Foreign currency transaction loss, net	$ 6,639	$ 0	$ 4,602	$ 0
Foreign Currency Collar [Member]
Derivative [Line Items]
Gain recognized on derivatives	1,500		1,500
Foreign currency transaction loss, net	$ 8,200		$ 6,100
Not Designated as Hedging Instrument [Member] | Foreign Currency Collar [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative [Line Items]
Number of Instruments | investment	4		4
Asset derivatives - foreign currency collars	$ 1,527		$ 1,527

FAIR VALUE DISCLOSURES (Schedul

FAIR VALUE DISCLOSURES (Schedule of Face Value, Carrying Amounts and Fair Value) (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate loans receivable, Face Value	$ 0	$ 27,850,000
Notes and Bonds Payable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and bond payable, Face Value	689,056,000	550,796,000
Series A Debentures [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and bond payable, Face Value	258,976,000	0
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate loans receivable, Value	0	27,850,000
Carrying Amount [Member] | Notes and Bonds Payable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and bond payable, Value	686,169,000	547,323,000
Carrying Amount [Member] | Series A Debentures [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and bond payable, Value	250,163,000	0
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate loans receivable, Value	0	27,850,000
Fair Value [Member] | Notes and Bonds Payable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and bond payable, Value	691,413,000	554,007,000
Fair Value [Member] | Series A Debentures [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes and bond payable, Value	$ 250,222,000	$ 0

FAIR VALUE DISCLOSURES (Sched58

FAIR VALUE DISCLOSURES (Schedule of Assets at Fair Value) (Details) - Recurring Basis [Member] $ in Thousands	Sep. 30, 2016USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives - foreign currency collars	$ 1,527
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives - foreign currency collars	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives - foreign currency collars	1,527
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives - foreign currency collars	$ 0

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Related Party Transaction [Line Items]
Payment for administrative fees	$ 30	$ 114	$ 36	$ 98
Advisor and Dealer Manager [Member]
Related Party Transaction [Line Items]
Expenses	4,386	2,229	10,345	6,538
Payable as of	51		51		$ 59
Advisor and Dealer Manager [Member] | Asset Management Fees [Member]
Related Party Transaction [Line Items]
Expenses	2,639	2,112	6,932	6,242
Payable as of	0		0		0
Advisor and Dealer Manager [Member] | Real Estate Acquisition Fee [Member]
Related Party Transaction [Line Items]
Expenses	1,690	0	2,964	0
Payable as of	0		0		0
Advisor and Dealer Manager [Member] | Reimbursement of Operating Expenses [Member]
Related Party Transaction [Line Items]
Expenses	57	39	170	116
Payable as of	51		51		59
Advisor and Dealer Manager [Member] | Dispositon Fees [Member]
Related Party Transaction [Line Items]
Expenses	0	$ 78	279	$ 180
Payable as of	0		0		$ 0
KBS Capital Advisors LLC [Member] | Property Insurance Rebate [Member]
Related Party Transaction [Line Items]
Due from affiliate	66		66
KBS Capital Advisors LLC [Member] | Legal and Professional Fees Reimbursement [Member]
Related Party Transaction [Line Items]
Due from affiliate	$ 69		$ 69

INVESTMENT IN UNCONSOLIDATED 60

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Narrative) (Details) $ in Thousands	May 18, 2012USD ($)ft²property	Sep. 30, 2016USD ($)ft²property	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)ft²property	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)	May 02, 2014ft²
Schedule of Equity Method Investments [Line Items]
Rentable square feet | ft²		5,500,000		5,500,000
Initial capital contribution				$ 2,820	$ 2,760
Investments in unconsolidated joint ventures		$ 76,118		76,118		$ 74,437
Acquisition related costs		$ 274	$ 0	$ 542	$ 0
NIP Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Number of real estate properties | property		21		21
Rentable square feet | ft²	10,800,000
Initial capital contribution	$ 8,000
Investments in unconsolidated joint ventures		$ 5,305		$ 5,305		5,305
NIP Joint Venture [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	5.00%	5.00%		5.00%
NIP Joint Venture [Member] | Industrial [Member]
Schedule of Equity Method Investments [Line Items]
Number of real estate properties | property	21
110 William Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Number of real estate properties | property		1		1
Rentable square feet | ft²							928,157
Ownership interest		60.00%		60.00%
Investments in unconsolidated joint ventures		$ 70,813		$ 70,813		$ 69,132
Area of land | ft²							0.8
Acquisition related costs				$ 1,500
110 William Joint Venture [Member] | 110 William JV Partner [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest							60.00%
Noncontrolling interest							40.00%

INVESTMENT IN UNCONSOLIDATED 61

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Investments in Unconsolidated Joint Ventures) (Details) $ in Thousands	Sep. 30, 2016USD ($)property	Dec. 31, 2015USD ($)	May 18, 2012
Schedule of Equity Method Investments [Line Items]
Investment Balance	$ 76,118	$ 74,437
OCM NIP JV Holdings, L.P. and HC KBS NIP JV, LLC (“HC-KBS”) [Member]
Schedule of Equity Method Investments [Line Items]
Number of Properties | property	21
Investment Balance	$ 5,305	5,305
OCM NIP JV Holdings, L.P. and HC KBS NIP JV, LLC (“HC-KBS”) [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Ownership %	5.00%		5.00%
110 William Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Number of Properties | property	1
Ownership %	60.00%
Investment Balance	$ 70,813	$ 69,132

INVESTMENT IN UNCONSOLIDATED 62

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Summarized Financial Information - 110 William Joint Venture) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Real estate assets, net of accumulated depreciation and amortization	$ 1,109,425		$ 1,109,425		$ 822,514
Total assets	1,306,090		1,306,090		1,004,214
Other liabilities	14,596		14,596		17,905
Total Liabilities and Equity	1,306,090		1,306,090		1,004,214
Balance outstanding	948,032		948,032
Deferred financing costs, net	11,778		11,778		3,523
Income Statement [Abstract]
Revenues	36,133	$ 28,158	98,365	$ 84,769
Operating, maintenance, and management	10,932	9,930	29,755	27,855
Real estate taxes and insurance	4,516	3,940	12,419	11,439
Depreciation and amortization	14,337	11,297	37,436	33,684
Interest expense	7,992	3,524	20,354	11,292
Total expenses	50,356	31,695	119,176	93,136
Other income	0	195	0	5,084
Net (loss) income attributable to common stockholders	(14,951)	(462)	(21,804)	3,299
Company’s equity in (loss) income of unconsolidated joint venture	(791)	150	(1,139)	(186)
Mortgages [Member] | Mezzanine Loan [Member]
Balance Sheet Related Disclosures [Abstract]
Balance outstanding					20,000
110 William Joint Venture [Member]
Balance Sheet Related Disclosures [Abstract]
Real estate assets, net of accumulated depreciation and amortization	264,342		264,342		269,664
Other assets	23,251		23,251		18,973
Total assets	287,593		287,593		288,637
Notes payable, net	158,845		158,845		162,395
Other liabilities	13,269		13,269		13,617
Partners’ capital	115,479		115,479		112,625
Total Liabilities and Equity	287,593		287,593		288,637
Income Statement [Abstract]
Revenues	8,461	9,214	25,100	25,911
Operating, maintenance, and management	3,162	2,569	8,120	8,056
Real estate taxes and insurance	1,535	1,642	4,502	4,329
Depreciation and amortization	3,563	3,194	9,831	9,476
Interest expense	1,517	1,552	4,541	4,627
Total expenses	9,777	8,957	26,994	26,488
Other income	16	11	48	319
Net (loss) income attributable to common stockholders	(1,300)	268	(1,846)	(258)
Company’s equity in (loss) income of unconsolidated joint venture	(791)	$ 150	(1,139)	$ (186)
110 William Joint Venture [Member] | Mortgages [Member] | First Mortgage Loan [Member]
Balance Sheet Related Disclosures [Abstract]
Balance outstanding	$ 136,900		$ 136,900		138,600
Contractual interest rate, percentage	4.80%		4.80%
110 William Joint Venture [Member] | Mortgages [Member] | Mezzanine Loan [Member]
Balance Sheet Related Disclosures [Abstract]
Balance outstanding	$ 20,000		$ 20,000
Contractual interest rate, percentage	9.50%		9.50%
110 William Joint Venture [Member] | Notes Payable [Member]
Balance Sheet Related Disclosures [Abstract]
Unamortized premium	$ 2,300		$ 2,300		4,500
Deferred financing costs, net	$ 300		$ 300		$ 700

UNAUDITED PRO FORMA FINANCIAL63

UNAUDITED PRO FORMA FINANCIAL INFORMATION (Narrative) (Details) $ in Millions	Jul. 11, 2016property	Sep. 30, 2016USD ($)	Sep. 30, 2016USD ($)property
Westpark Portfolio [Member] | Office Portfolio [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired			1
353 Sacramento [Member] | Office Building [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired	1		1
Westpark Portfolio and 353 Sacramento [Member]
Business Acquisition [Line Items]
Acquisition related costs | $		$ 2	$ 3.5

UNAUDITED PRO FORMA FINANCIAL64

UNAUDITED PRO FORMA FINANCIAL INFORMATION (Unaudited Pro Forma Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition, Pro Forma Information [Abstract]
Revenues	$ 36,478	$ 33,779	$ 108,795	$ 101,632
Depreciation and amortization	14,472	13,582	41,989	40,539
Net (loss) income	$ (12,990)	$ (119)	$ (18,101)	$ 8,221

SUBSEQUENT EVENTS (Investment)

SUBSEQUENT EVENTS (Investment) (Details) - Point Trust LLC [Member] - USD ($) $ / shares in Units, $ in Millions	Oct. 28, 2016	Apr. 28, 2017	Apr. 28, 2018	Oct. 28, 2019
Series B Preferred Units [Member] | Scenario, Forecast [Member]
Subsequent Event [Line Items]
Payment of quarterly distributions, percent		7.00%	9.00%	12.00%
Subsequent Event [Member] | Series B Preferred Units [Member]
Subsequent Event [Line Items]
Investment (in shares)	25,000
Share price (usd per share)	$ 1,000
Payments to acquire investments	$ 25
Investment, increment of additional purchase (in shares)	5,000
Exit fee, percent of redemption price	1.00%
Subsequent Event [Member] | Preferred Units [Member]
Subsequent Event [Line Items]
Investment (in shares)	5,000
Payments to acquire investments	$ 4.4
Investments, equity commitment fee	$ 0.6

SUBSEQUENT EVENTS (Financing) (

SUBSEQUENT EVENTS (Financing) (Details) - Subsequent Event [Member] - 353 Sacramento Mortgage Loan [Member] - Line of Credit [Member] $ in Millions	Oct. 14, 2016USD ($)extension
Interest Rate Cap [Member]
Subsequent Event [Line Items]
Notional amount	$ 115.5
Interest rate	3.00%
Mortgages [Member]
Subsequent Event [Line Items]
Term of credit facility	2 years
Maximum borrowing capacity	$ 115.5
Amount outstanding	85.5
Remaining borrowing capacity	$ 30
Number of extensions | extension	3
Extension period	1 year
Extension fee as percent of outstanding principal balance	0.25%
Mortgages [Member] | One-month LIBOR [Member]
Subsequent Event [Line Items]
Basis spread on variable rate	2.75%