KBS Real Estate Investment Trust II (KBRS) 10-Q 7 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Entity Registrant Name	KBS Real Estate Investment Trust II, Inc.
Entity Central Index Key	1,411,059
Entity Filer Category	Non-accelerated Filer
Current Fiscal Year end	--12-31
Entity Common Stock, Shares Outstanding		186,672,158

CONSOLIDATED BALANCE SHEETS (un

CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Real estate:
Land	$ 158,036	$ 158,036
Buildings and improvements	936,053	918,587
Tenant origination and absorption costs	41,568	53,901
Total real estate held for investment, cost	1,135,657	1,130,524
Less accumulated depreciation and amortization	(178,448)	(166,372)
Total real estate held for investment, net	957,209	964,152
Real estate held for sale, net	0	66,717
Total real estate, net	957,209	1,030,869
Real estate loan receivable, net	0	13,923
Total real estate and real estate-related investments, net	957,209	1,044,792
Cash and cash equivalents	80,578	81,017
Restricted cash	12,754	5,626
Rents and other receivables, net	58,847	59,872
Above-market leases, net	421	2,118
Assets related to real estate held for sale	0	2,927
Prepaid expenses and other assets	28,347	28,758
Total assets	1,138,156	1,225,110
Notes payable:
Notes payable, net	415,195	407,719
Notes payable related to real estate held for sale, net	0	94,580
Total notes payable, net	415,195	502,299
Accounts payable and accrued liabilities	20,126	13,166
Due to affiliate	113	84
Distributions payable	3,754	4,376
Below-market leases, net	422	984
Liabilities related to real estate held for sale	0	320
Other liabilities	17,777	9,299
Total liabilities	457,387	530,528
Commitments and contingencies (Note 10)
Redeemable common stock	5,498	10,000
Stockholders’ 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, 186,745,659 and 187,666,302 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	1,868	1,877
Additional paid-in capital	1,673,776	1,673,767
Cumulative distributions in excess of net income	(1,000,373)	(991,062)
Total stockholders’ equity	675,271	684,582
Total liabilities and stockholders’ equity	$ 1,138,156	$ 1,225,110

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	186,745,659	187,666,302
Common stock, shares outstanding (in shares)	186,745,659	187,666,302

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Rental income	$ 28,415	$ 30,649	$ 88,007	$ 95,384
Tenant reimbursements	2,558	3,401	9,027	10,842
Interest income from real estate loans receivable	0	267	434	795
Other operating income	1,709	1,827	5,512	5,441
Total revenues	32,682	36,144	102,980	112,462
Expenses:
Operating, maintenance, and management	8,773	8,315	25,379	25,600
Real estate taxes and insurance	4,387	5,014	13,634	15,092
Asset management fees to affiliate	2,688	2,899	8,192	8,746
General and administrative expenses	1,416	1,119	4,452	3,307
Depreciation and amortization	12,077	13,458	38,427	40,771
Interest expense	4,175	4,558	13,494	12,947
Total expenses	33,516	35,363	103,578	106,463
Other income:
Other interest income	380	118	867	167
Loss from extinguishment of debt	0	0	(212)	0
Gain on sale of real estate, net	0	0	24,884	7,863
Total other income	380	118	25,539	8,030
Net (loss) income	$ (454)	$ 899	$ 24,941	$ 14,029
Net income per common share, basic and diluted (in dollars per share)	$ 0	$ 0	$ 0.13	$ 0.07
Weighted-average number of common shares outstanding, basic and diluted (in shares)	186,968,315	188,085,093	187,293,455	188,390,374

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Cumulative Distributions and Net Income (Loss)
Balance (in shares) at Dec. 31, 2016		188,719,952
Balance at Dec. 31, 2016	$ 716,907	$ 1,887	$ 1,679,524	$ (964,504)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	25,114			25,114
Redemptions of common stock (in shares)		(1,053,650)
Redemptions of common stock	(5,767)	$ (10)	(5,757)
Distributions declared	$ (51,672)			(51,672)
Balance (in shares) at Dec. 31, 2017	187,666,302	187,666,302
Balance at Dec. 31, 2017	$ 684,582	$ 1,877	1,673,767	(991,062)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,941			24,941
Redemptions of common stock (in shares)		(920,643)
Redemptions of common stock	(4,502)	$ (9)	(4,493)
Distributions declared	(34,252)			(34,252)
Transfers from redeemable common stock	$ 4,502		4,502
Balance (in shares) at Sep. 30, 2018	186,745,659	186,745,659
Balance at Sep. 30, 2018	$ 675,271	$ 1,868	$ 1,673,776	$ (1,000,373)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Cash Flows from Operating Activities:
Net income	$ (454)	$ 899	$ 24,941	$ 14,029	$ 25,114
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,077	13,458	38,427	40,771
Noncash interest income on real estate-related investments			3	3
Deferred rent			3,096	(1,549)
Bad debt expense			213	264
Amortization of above- and below-market leases, net			948	540
Amortization of deferred financing costs	300	200	940	841
Unrealized gains on derivative instruments			0	(101)
Loss from extinguishment of debt	0	0	212	0
Gain on sale of real estate, net			(24,884)	(7,863)
Changes in operating assets and liabilities:
Rents and other receivables			(2,391)	(1,163)
Prepaid expenses and other assets			(2,601)	(2,302)
Accounts payable and accrued liabilities			3,180	(1,097)
Due to affiliate			29	10
Other liabilities			8,478	520
Net cash provided by operating activities			50,591	42,903
Cash Flows from Investing Activities:
Proceeds from sale of real estate			94,015	45,689
Improvements to real estate			(24,205)	(10,131)
Principal repayments on real estate loans receivable			13,920	112
Net cash provided by investing activities			83,730	35,670
Cash Flows from Financing Activities:
Proceeds from note payable			375,000	0
Principal payments on notes payable			(460,446)	(2,615)
Payments of deferred financing costs			(2,810)	(735)
Payments to redeem common stock			(4,502)	(4,600)
Distributions paid to common stockholders			(34,874)	(38,931)
Net cash used in financing activities			(127,632)	(46,881)
Net increase in cash and cash equivalents and restricted cash			6,689	31,692
Cash and cash equivalents and restricted cash, beginning of period			86,643	48,009	48,009
Cash and cash equivalents and restricted cash, end of period	$ 93,332	$ 79,701	93,332	79,701	$ 86,643
Supplemental Disclosure of Cash Flow Information:
Interest paid			12,663	12,076
Supplemental Disclosure of Noncash Transactions:
Increase in accrued improvements to real estate			$ 3,780	$ 1,421

ORGANIZATION

ORGANIZATION	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION KBS Real Estate Investment Trust II, Inc. (the “Company”) was formed on July 12, 2007 as a Maryland corporation that elected to be taxed as a real estate investment trust (“REIT”) beginning with the taxable year ended December 31, 2008. The Company conducts its business primarily through KBS Limited Partnership II, a Delaware limited partnership formed on August 23, 2007 (the “Operating Partnership”), and its subsidiaries. The Company is the sole general partner of and directly owns a 0.1% partnership interest in the Operating Partnership. The Company’s wholly-owned subsidiary, KBS REIT Holdings II LLC, a Delaware limited liability company formed on August 23, 2007 (“KBS REIT Holdings II”), owns the remaining 99.9% partnership interest in the Operating Partnership and is its sole limited partner. The Company invested in a diverse portfolio of real estate and real estate-related investments. As of September 30, 2018 , the Company owned eight office properties and an office campus consisting of five office buildings. Subject to certain restrictions and limitations, the business of the Company is 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 May 21, 2018 (the “Advisory Agreement”). The Advisory Agreement may be renewed for an unlimited number of one -year periods upon the mutual consent of the Advisor and the Company. Either party may terminate the Advisory Agreement upon 60 days’ written notice. The Advisor owns 20,000 shares of the Company’s common stock. Upon commencing its initial public offering (the “Offering”), the Company retained KBS Capital Markets Group LLC (the “Dealer Manager”), an affiliate of the Advisor, to serve as the dealer manager of the Offering. The Company ceased offering shares of common stock in its primary offering on December 31, 2010 and terminated its primary offering on March 22, 2011. The Company terminated its dividend reinvestment plan effective May 29, 2014. The Company sold 182,681,633 shares of common stock in its primary offering for gross offering proceeds of $1.8 billion . The Company sold 30,903,504 shares of common stock under its dividend reinvestment plan for gross offering proceeds of $298.2 million . Also as of September 30, 2018 , the Company had redeemed 26,859,478 shares sold in the Offering for $250.3 million .

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2018
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, 2017 , except for the Company’s adoption of the revenue recognition standards issued by the Financial Accounting Standards Board (“FASB”) effective on January 1, 2018. 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, 2017 included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (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 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 nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. The consolidated financial statements include the accounts of the Company, KBS REIT Holdings II, the Operating Partnership, and their direct and indirect wholly owned subsidiaries. All significant intercompany balances and transactions are eliminated in consolidation. Use of Estimates The preparation of the consolidated financial statements and condensed notes thereto in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and condensed notes. Actual results could materially differ from those estimates. Per Share Data Basic net income (loss) per share of common stock is calculated by dividing net income (loss) 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 nine months ended September 30, 2018 and 2017 , respectively. Distributions declared per common share were $0.062 and $0.183 in the aggregate for the three and nine months ended September 30, 2018 , respectively, and $0.069 and $0.205 in the aggregate for the three and nine months ended September 30, 2017 , respectively. Distributions declared per common share assumes each share was issued and outstanding each day that was a record date for distributions and were based on a monthly record date for each month during the periods commencing January 2018 through September 2018 and January 2017 through September 2017 . Segments The Company invested in core real estate properties and real estate-related investments with the goal of acquiring a portfolio of income-producing investments. The Company’s real estate properties exhibit similar long-term financial performance and have similar economic characteristics to each other. As of September 30, 2018 , the Company aggregated its investments in real estate properties into one reportable business segment. 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 prior periods. During the nine months ended September 30, 2018 , the Company sold three office buildings that were part of an eight -building office campus. As a result, certain assets and liabilities were reclassified to held for sale on the consolidated balance sheets for all periods presented. Revenue Recognition Effective January 1, 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”), using the modified retrospective approach, which requires a cumulative effect adjustment as of the date of the Company’s adoption. Under the modified retrospective approach, an entity may also elect to apply this standard to either (i) all contracts as of January 1, 2018 or (ii) only to contracts that were not completed as of January 1, 2018. A completed contract is a contract for which all (or substantially all) of the revenue was recognized under legacy GAAP that was in effect before the date of initial application. The Company elected to apply this standard only to contracts that were not completed as of January 1, 2018. Based on the Company’s evaluation of contracts within the scope of ASU No. 2014-09, revenue that is impacted by ASU No. 2014-09 includes revenue generated by sales of real estate, other operating income and tenant reimbursements for substantial services earned at the Company’s properties. The recognition of such revenue will occur when the services are provided and the performance obligations are satisfied. For the three and nine months ended September 30, 2018 , tenant reimbursements for substantial services accounted for under ASU No. 2014-09 were $0.5 million and $1.3 million and were included in tenant reimbursements on the accompanying statements of operations. Sales of Real Estate Prior to January 1, 2018, gains on real estate sold were recognized using the full accrual method at closing when collectibility of the sales price was reasonably assured, the Company was not obligated to perform additional activities that may be considered significant, the initial investment from the buyer was sufficient and other profit recognition criteria had been satisfied. Gain on sales of real estate may have been deferred in whole or in part until the requirements for gain recognition had been met. Effective January 1, 2018, the Company adopted the guidance of ASC 610-20, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (“ASC 610-20”), which applies to sales or transfers to noncustomers of nonfinancial assets or in substance nonfinancial assets that do not meet the definition of a business. Generally, the Company’s sales of real estate would be considered a sale of a nonfinancial asset as defined by ASC 610-20. ASC 610-20 refers to the revenue recognition principles under ASU No. 2014-09. Under ASC 610-20, if the Company determines it does not have a controlling financial interest in the entity that holds the asset and the arrangement meets the criteria to be accounted for as a contract, the Company would derecognize the asset and recognize a gain or loss on the sale of the real estate when control of the underlying asset transfers to the buyer. Square Footage, Occupancy and Other Measures Square footage, occupancy, number of tenants and other similar measures, including annualized base rent and annualized base rent per square foot, used to describe real estate investments included in these condensed notes to the consolidated financial statements 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 Update 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 as of its issuance is permitted. ASU No. 2016-02 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. Upon adoption of ASU No. 2016-02, the Company expects to adopt the package of practical expedients for all leases that commenced before the effective date of January 1, 2019. Accordingly, the Company will 1) not reassess whether any expired or existing contracts are or contain leases, 2) not reassess the lease classification for any expired or existing lease, and 3) not reassess initial direct costs for any existing leases. The Company does not expect to elect the practical expedient related to using hindsight to reevaluate the lease term. In addition, the Company expects to adopt the practical expedient for land easements to not assess whether existing or expired land easements that were not previously accounted for as leases under the current lease accounting standards of Topic 840 are or contain a lease under Topic 842. In July 2018, the FASB issued ASU No. 2018-11, Leases (Topic 842), Targeted Improvements (“ASU No. 2018-11”), which provides lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead to account for those components as a single component if the nonlease components otherwise would be accounted for under the new revenue recognition standard (Topic 606) and if certain conditions are met. Upon adoption of the lease accounting standard under Topic 842, the Company expects to adopt this practical expedient, specifically related to its tenant reimbursements which would otherwise be accounted for under the new revenue recognition standard. The Company believes the two conditions have been met for tenant reimbursements as 1) the timing and pattern of transfer of the nonlease components and associated lease components are the same and 2) the lease component would be classified as an operating lease. In addition, ASU No. 2018-11 provides an additional optional transition method to allow entities to apply the new lease accounting standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings. An entity’s reporting for the comparative periods presented in the financial statements in which it adopts the new lease accounting standard will continue to be reported under the current lease accounting standards of Topic 840. The Company expects to adopt this transition method upon adoption of the lease accounting standard of Topic 842 on January 1, 2019. The Company is currently evaluating the impact of adopting the new lease accounting standards on its consolidated financial statements. The Company is in process of creating an inventory of its leases where the Company may be a lessee to assess the potential impact to the Company’s financial statements upon adoption of the new lease accounting standards. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses of Financial Instruments (“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. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework -Changes to the Disclosure Requirements for Fair Value Measurement (“ASU No. 2018-13”). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. ASU No. 2018-13 removes the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for the timing of transfers between levels and the valuation processes for Level 3 fair value measurements. It also adds a requirement to disclose changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and to disclose the range and weighted average of significant unobservable inputs used to develop recurring and nonrecurring Level 3 fair value measurements. For certain unobservable inputs, entities may disclose other quantitative information in lieu of the weighted average if the other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop the Level 3 fair value measurements. In addition, public entities are required to provide information about the measurement uncertainty of recurring Level 3 fair value measurements from the use of significant unobservable inputs if those inputs reasonably could have been different at the reporting date. ASU No. 2018-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Entities are permitted to early adopt either the entire standard or only the provisions that eliminate or modify the requirements. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. The Company is still evaluating the impact of adopting ASU No. 2018-13 on its financial statements, but does not expect the adoption of ASU No. 2018-13 to have a material impact on its financial statements.

REAL ESTATE HELD FOR INVESTMENT

REAL ESTATE HELD FOR INVESTMENT	9 Months Ended
	Sep. 30, 2018
Real Estate [Abstract]
REAL ESTATE HELD FOR INVESTMENT	REAL ESTATE HELD FOR INVESTMENT As of September 30, 2018 , the Company’s portfolio of real estate held for investment was composed of eight office properties and an office campus consisting of five office buildings, encompassing in the aggregate approximately 4.5 million rentable square feet. As of September 30, 2018 , the Company’s real estate portfolio was 81% occupied. The following table summarizes the Company’s real estate portfolio as of September 30, 2018 (in thousands): Property Date Acquired City State Property Type Total Real Estate at Cost Accumulated Depreciation and Amortization Total Real Estate, Net 100 & 200 Campus Drive Buildings 09/09/2008 Florham Park NJ Office $ 154,246 $ (15,212 ) $ 139,034 300-600 Campus Drive Buildings 10/10/2008 Florham Park NJ Office 161,577 (20,213 ) 141,364 Willow Oaks Corporate Center 08/26/2009 Fairfax VA Office 108,174 (21,284 ) 86,890 Pierre Laclede Center 02/04/2010 Clayton MO Office 81,738 (12,760 ) 68,978 Union Bank Plaza 09/15/2010 Los Angeles CA Office 185,271 (26,913 ) 158,358 Emerald View at Vista Center 12/09/2010 West Palm Beach FL Office 31,874 (7,760 ) 24,114 Granite Tower 12/16/2010 Denver CO Office 137,362 (29,160 ) 108,202 Fountainhead Plaza 09/13/2011 Tempe AZ Office 119,383 (21,885 ) 97,498 Corporate Technology Centre 03/28/2013 San Jose CA Office 156,032 (23,261 ) 132,771 $ 1,135,657 $ (178,448 ) $ 957,209 As of September 30, 2018 , the following properties represented more than 10% of the Company’s total assets: Property Location Rentable Square Feet Total Real Estate, Net (in thousands) Percentage of Total Assets Annualized Base Rent (in thousands) (1) Average Annualized Base Rent per Sq. Ft. Occupancy Union Bank Plaza Los Angeles, CA 627,334 $ 158,358 13.9 % $ 20,321 $ 43.32 75 % 300-600 Campus Drive Buildings Florham Park, NJ 578,424 141,364 12.4 % 17,865 33.63 92 % 100 & 200 Campus Drive Buildings Florham Park, NJ 590,458 139,034 12.2 % 13,107 31.59 70 % Corporate Technology Centre San Jose, CA 415,700 132,771 11.7 % 10,938 34.29 77 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2018 , 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. Operating Leases The Company’s real estate properties are leased to tenants under operating leases for which the terms and expirations vary. As of September 30, 2018 , the leases had remaining terms, excluding options to extend, of up to 13.1 years with a weighted-average remaining term of 4.8 years. Some of the leases have provisions to extend the term of the leases, options for early termination for all or part of the leased premises 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 the tenant 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 lease and the creditworthiness of the tenant, but generally is not a significant amount. 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 related to tenant leases are included in other liabilities in the accompanying consolidated balance sheets and totaled $2.6 million and $2.6 million as of September 30, 2018 and December 31, 2017 , respectively. During the nine months ended September 30, 2018 and 2017 , the Company recognized deferred rent from tenants, net of lease incentive amortization, of $(3.1) million and $1.5 million , respectively. As of September 30, 2018 and December 31, 2017 , the cumulative deferred rent balance was $55.9 million and $57.6 million , respectively, and is included in rents and other receivables on the accompanying balance sheets. The cumulative deferred rent balance included $9.6 million and $9.5 million of unamortized lease incentives as of September 30, 2018 and December 31, 2017 , respectively. As of September 30, 2018 , the future minimum rental income from the Company’s properties under non-cancelable operating leases was as follows (in thousands): October 1, 2018 through December 31, 2018 $ 26,911 2019 104,973 2020 99,932 2021 88,416 2022 66,238 Thereafter 219,161 $ 605,631 As of September 30, 2018 , the Company had approximately 182 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 Finance 31 $ 26,739 22.9 % Legal Services 33 15,017 12.9 % Mining, Oil & Gas Extraction 4 13,674 11.7 % Computer System Design & Programming 3 11,895 10.2 % $ 67,325 57.7 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2018 , 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. The Company had not identified any material tenant credit issues as of September 30, 2018 . During the nine months ended September 30, 2018 and 2017 , the Company recorded bad debt expense of $0.2 million and $0.3 million , respectively. As of September 30, 2018 , the Company had a bad debt expense reserve of approximately $0.3 million , which represented less than 1% of its annualized base rent. As of September 30, 2018 , the Company had a concentration of credit risk related to the following tenant lease that represented more than 10% of the Company’s annualized base rent: Annualized Base Rent Statistics Tenant Property Tenant Industry Square Feet % of Portfolio (Net Rentable Sq. Ft.) Annualized Base Rent (in thousands) (1) % of Portfolio Annualized Base Rent Annualized Base Rent per Sq. Ft. Lease Expiration (2) (3) Union Bank Union Bank Plaza Finance 295,563 6.5% $ 13,687 11.7% $ 46.31 01/31/2022 _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2018 , 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. (2) Represents the expiration date of the lease as of September 30, 2018 and does not take into account any tenant renewal options. Pursuant to a lease amendment that the Company entered into with Union Bank on December 31, 2017, Union Bank surrendered 15,829 rentable square feet of its total rentable square footage on March 31, 2018 and 31,320 rentable square feet of its total rentable square footage on June 30, 2018. In addition, Union Bank also surrendered 321 parking area passes on March 31, 2018. During the nine months ended September 30, 2018 , the Company received $11.4 million of lease termination fees from Union Bank, of which $2.2 million was recognized as rental income in the accompanying consolidated statements of operations for the nine months ended September 30, 2018 , and $9.2 million was deferred as of September 30, 2018 and included in other liabilities on the accompanying consolidated balance sheets. (3) Union Bank has two options to extend the term of this lease for three, four, five, six or seven years per option term, provided that the combined renewal option terms do not exceed 10 years. If Union Bank elects to exercise its extension options, it must extend the lease on (i) the entire office premises or (ii) no less than 200,000 rentable square feet consisting of full floors only plus either all or none of both the retail and vault space. No other tenant accounted for more than 10% of annualized base rent. Geographic Concentration Risk As of September 30, 2018 , the Company’s net investments in real estate in California and New Jersey represented 25.6% and 24.6% 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 California and New Jersey 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.

TENANT ORIGINATION AND ABSORPTI

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES	9 Months Ended
	Sep. 30, 2018
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, 2018 and December 31, 2017 , 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 $ 41,568 $ 53,901 $ 12,804 $ 13,650 $ (5,011 ) $ (6,703 ) Accumulated amortization (26,375 ) (33,042 ) (12,383 ) (11,532 ) 4,589 5,719 Net amount $ 15,193 $ 20,859 $ 421 $ 2,118 $ (422 ) $ (984 ) 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, 2018 and 2017 were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Three Months Ended September 30, For the Three Months Ended September 30, For the Three Months Ended September 30, 2018 2017 2018 2017 2018 2017 Amortization $ (1,410 ) $ (2,281 ) $ (555 ) $ (593 ) $ 144 $ 383 Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Nine Months Ended September 30, For the Nine Months Ended September 30, For the Nine Months Ended September 30, 2018 2017 2018 2017 2018 2017 Amortization $ (5,815 ) $ (7,218 ) $ (1,697 ) $ (1,765 ) $ 749 $ 1,225

REAL ESTATE LOAN RECEIVABLE

REAL ESTATE LOAN RECEIVABLE	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
REAL ESTATE LOAN RECEIVABLE	REAL ESTATE LOAN RECEIVABLE As of December 31, 2017 , the Company, through an indirect wholly owned subsidiary, had originated the following real estate loan receivable, which was paid off in full on June 1, 2018 (dollars in thousands): Loan Name Location of Related Property or Collateral Date Acquired/ Originated Property Type Loan Type Outstanding Principal Balance as of September 30, 2018 Book Value as of September 30, 2018 (1) Book Value as of December 31, 2017 (1) Contractual Interest Rate Annualized Effective Interest Rate Maturity Date Sheraton Charlotte Airport Hotel First Mortgage (2) Charlotte, North Carolina 07/11/2011 Hotel Mortgage $ — $ — $ 13,923 (2) (2) (2) _____________________ (1) Book value represents outstanding principal balance, adjusted for unamortized acquisition discounts, origination fees and direct origination and acquisition costs. (2) On June 1, 2018, the borrower under the Sheraton Charlotte Airport Hotel First Mortgage paid off the entire principal balance due to the Company. The Sheraton Charlotte Airport Hotel First Mortgage had a maturity date of August 1, 2018. The Sheraton Charlotte Airport Hotel First Mortgage bore interest at a fixed rate of 7.5% . The following summarizes the activity related to the real estate loan receivable for the nine months ended September 30, 2018 (in thousands): Real estate loan receivable - December 31, 2017 $ 13,923 Principal repayments received on the real estate loan receivable (13,920 ) Amortization of closing costs and origination fees on the real estate loan receivable (3 ) Real estate loan receivable - September 30, 2018 $ — For the three and nine months ended September 30, 2018 and 2017 , interest income from the real estate loan receivable consisted of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Contractual interest income $ — $ 268 $ 437 $ 798 Amortization of closing costs and origination fees — (1 ) (3 ) (3 ) Interest income from real estate loan receivable $ — $ 267 $ 434 $ 795

REAL ESTATE HELD FOR SALE

REAL ESTATE HELD FOR SALE	9 Months Ended
	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
REAL ESTATE HELD FOR SALE	REAL ESTATE HELD FOR SALE 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. During the nine months ended September 30, 2018 , the Company sold three office buildings that were part of an eight -building office campus. During the year ended December 31, 2017 , the Company sold two office properties. The results of operations for the properties sold during the nine months ended September 30, 2018 and the year ended December 31, 2017 are included in continuing operations on the Company’s consolidated statements of operations. As of September 30, 2018 , the Company did not have any real estate properties held for sale. The following table summarizes certain revenue and expenses related to the Company’s real estate properties that were sold during the year ended December 31, 2017 and nine months ended September 30, 2018 , which were included in continuing operations (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Revenues Rental income $ — $ 1,701 $ 2,253 $ 8,747 Tenant reimbursements (79 ) 484 378 1,981 Total revenues (79 ) 2,185 2,631 10,728 Expenses Operating, maintenance, and management 11 235 131 1,415 Real estate taxes and insurance (106 ) 444 278 1,639 Asset management fees to affiliate — 241 222 884 General and administrative expenses 15 55 29 78 Depreciation and amortization (3 ) 814 720 2,753 Interest expense — 576 588 1,752 Total expenses $ (83 ) $ 2,365 $ 1,968 $ 8,521 The following summary presents the major components of assets and liabilities related to real estate held for sale as of December 31, 2017 (in thousands). No real estate properties were held for sale as of September 30, 2018 . September 30, 2018 December 31, 2017 Assets related to real estate held for sale Total real estate, at cost $ — $ 76,921 Accumulated depreciation and amortization — (10,204 ) Real estate held for sale, net — 66,717 Other assets — 2,927 Total assets related to real estate held for sale $ — $ 69,644 Liabilities related to real estate held for sale Notes payable, net — 94,580 Other liabilities — 320 Total liabilities related to real estate held for sale $ — $ 94,900

NOTES PAYABLE

NOTES PAYABLE	9 Months Ended
	Sep. 30, 2018
Notes Payable [Abstract]
NOTES PAYABLE	NOTES PAYABLE As of September 30, 2018 and December 31, 2017 , the Company’s notes payable, including notes payable related to real estate held for sale as of December 31, 2017 , consisted of the following (dollars in thousands): Book Value as of September 30, 2018 Book Value as of December 31, 2017 Contractual Interest Rate as of September 30, 2018 (1) Effective Interest Rate as of September 30, 2018 (1) Payment Type Maturity Date (2) Amended and Restated Portfolio Revolving Loan Facility (3) $ — $ 52,638 (3) (3) (3) (3) Union Bank Plaza Mortgage Loan (3) — 105,000 (3) (3) (3) (3) Portfolio Mortgage Loan #1 (3) — 59,651 (3) (3) (3) (3) Portfolio Mortgage Loan #3 (3) — 54,000 (3) (3) (3) (3) Corporate Technology Centre Mortgage Loan (4) 42,187 138,219 3.50% 3.5% Principal & Interest 04/01/2020 300-600 Campus Drive Revolving Loan (3) — 93,125 (3) (3) (3) (3) Portfolio Loan Facility (5) 375,000 — One-month LIBOR + 1.45% 3.6% Interest Only 03/29/2020 Total notes payable principal outstanding $ 417,187 $ 502,633 Deferred financing costs, net (1,992 ) (334 ) Total notes payable, net $ 415,195 $ 502,299 _____________________ (1) Contractual interest rate represents the interest rate in effect under the loan as of September 30, 2018 . Effective interest rate is calculated as the actual interest rate in effect as of September 30, 2018 , using interest rate indices as of September 30, 2018 , where applicable. (2) Represents the initial maturity date or the maturity date as extended as of September 30, 2018 ; subject to certain conditions, the maturity dates of certain loans may be extended beyond the maturity date shown. (3) On March 29, 2018, the Company paid off the outstanding balances under these loans with proceeds from the Portfolio Loan Facility. See footnote (5) below. (4) In connection with the sales of three of the eight buildings at Corporate Technology Centre during the nine months ended September 30, 2018 , the Company made a partial paydown on the Corporate Technology Centre Mortgage Loan. (5) On March 29, 2018, the Company, through indirect wholly owned subsidiaries, entered into a loan facility (the “Portfolio Loan Facility”) for an amount of up to $500.0 million , of which $375.0 million is term debt and $125.0 million is revolving debt. The Portfolio Loan Facility was used to pay off the Amended and Restated Portfolio Revolving Loan Facility, the Union Bank Plaza Mortgage Loan, Portfolio Mortgage Loan #1, Portfolio Mortgage Loan #3 and the 300-600 Campus Drive Revolving Loan. The Portfolio Loan Facility is secured by the 100 & 200 Campus Drive Buildings, the 300-600 Campus Drive Buildings, Willow Oaks Corporate Center, Pierre Laclede Center, Union Bank Plaza, Emerald View at Vista Center, Granite Tower and Fountainhead Plaza. As of September 30, 2018 , $375.0 million of term debt of the Portfolio Loan Facility was outstanding and $125.0 million of revolving debt remained available for future disbursements, subject to certain terms and conditions set forth in the loan documents. During the three and nine months ended September 30, 2018 , the Company incurred $4.2 million and $13.5 million of interest expense, respectively. During the three and nine months ended September 30, 2017 , the Company incurred $4.6 million and $12.9 million of interest expense, respectively. As of September 30, 2018 and December 31, 2017 , $1.3 million and $1.4 million , respectively, of interest expense were payable. Included in interest expense for the three and nine months ended September 30, 2018 were $0.3 million and $0.9 million of amortization of deferred financing costs, respectively. Also included in interest expense for the nine months ended September 30, 2018 was $0.3 million of debt refinancing costs. Included in interest expense for the three and nine months ended September 30, 2017 were $0.2 million and $0.8 million of amortization of deferred financing costs, respectively. The following is a schedule of maturities, including principal amortization payments, for all notes payable outstanding as of September 30, 2018 (in thousands): October 1, 2018 through December 31, 2018 $ 319 2019 1,304 2020 415,564 $ 417,187 Certain of the Company’s notes payable contain financial debt covenants. As of September 30, 2018 , the Company was in compliance with these debt covenants.

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES	9 Months Ended
	Sep. 30, 2018
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 a combination of market quotes, pricing models and other 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 assets and liabilities for which it is practicable to estimate the fair value: Cash and cash equivalents, restricted cash, 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 (if applicable) and not at fair value. The fair value of the real estate loan receivable was estimated using an internal valuation model that considered the expected cash flows for the loan, underlying collateral value (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 payable: The fair value of the Company’s notes payable is 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 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 following were the face values, carrying amounts and fair values of the Company’s real estate loan receivable and notes payable as of September 30, 2018 and December 31, 2017 , which carrying amounts do not generally approximate the fair values (in thousands): September 30, 2018 December 31, 2017 Face Value Carrying Amount Fair Value Face Value Carrying Amount Fair Value Financial assets: Real estate loan receivable $ — $ — $ — $ 13,921 $ 13,923 $ 13,960 Financial liabilities: Notes payable $ 417,187 $ 415,195 $ 416,252 $ 502,633 $ 502,299 $ 500,683 Disclosure of the fair values of financial instruments is based on pertinent information available to the Company as of the period end and requires a significant amount of judgment. Low levels of transaction volume for certain financial instruments have 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.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	9 Months Ended
	Sep. 30, 2018
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS The Company has entered into the Advisory Agreement with the Advisor. This agreement entitles the Advisor to specified fees upon the provision of certain services with regard to the management of the Company’s investments, among other services, and the disposition of investments, as well as reimbursement of certain costs incurred by the Advisor in providing services to the Company. In addition, the Advisor is entitled to certain other fees, including an incentive fee upon achieving certain performance goals, as detailed in the Advisory Agreement. The Company has also entered into a fee reimbursement agreement with 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 or served as the advisor and dealer manager, respectively, for KBS Real Estate Investment Trust, Inc. (“KBS REIT I”), KBS Real Estate Investment Trust III, Inc. (“KBS REIT III”), KBS Strategic Opportunity REIT, Inc. (“KBS Strategic Opportunity REIT”), 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 III, KBS Strategic Opportunity REIT, 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 such insurance 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 program, 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. In June 2018, the Company renewed its participation in the program. At renewal, KBS Strategic Opportunity REIT, KBS Strategic Opportunity REIT II and KBS Legacy Partners Apartment REIT elected to cease participation in the program and obtained separate insurance coverage. The program is effective through June 30, 2019. KBS REIT I elected to cease participation in the program at the June 2017 renewal and obtained separate insurance coverage. During the nine months ended September 30, 2018 and 2017 , no other business transactions occurred between the Company and KBS REIT I, KBS REIT III, KBS Strategic Opportunity REIT, KBS Legacy Partners Apartment REIT, KBS Strategic Opportunity REIT II, KBS Growth & Income REIT, the Advisor, the Dealer Manager or other KBS-affiliated entities. 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, 2018 and 2017 , respectively, and any related amounts payable as of September 30, 2018 and December 31, 2017 (in thousands): Incurred Payable as of Three Months Ended September 30, Nine Months Ended September 30, September 30, December 31, 2018 2017 2018 2017 2018 2017 Expensed Asset management fees $ 2,688 $ 2,899 $ 8,192 $ 8,746 $ — $ — Reimbursement of operating expenses (1) 69 63 246 188 113 84 Disposition fees (2) — — 972 470 — — $ 2,757 $ 2,962 $ 9,410 $ 9,404 $ 113 $ 84 _____________________ (1) Reimbursable operating expenses primarily consists of internal audit personnel costs, accounting software and cybersecurity related expenses incurred by the Advisor 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 $53,000 and $63,000 for the three months ended September 30, 2018 and 2017 , respectively, and $181,000 and $167,000 for the nine months ended September 30, 2018 and 2017 , respectively, and were the only type of employee costs reimbursed under the Advisory Agreement for the nine months ended September 30, 2018 and 2017 . 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, net, in the accompanying consolidated statements of operations. During each of the nine months ended September 30, 2018 and 2017 , the Advisor reimbursed the Company $0.1 million for property insurance rebates.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2018
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 disposition of real estate investments; management of the daily operations of the Company’s real estate investment portfolio; and other general and administrative responsibilities. In the event the Advisor is unable to provide any of 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. Compliance with existing environmental laws is not expected to have a material adverse effect on the Company’s financial condition and results of operations as of September 30, 2018 . Legal Matters From time to time, the Company is 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 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, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Company evaluates subsequent events up until the date the consolidated financial statements are issued. Distributions Paid On October 1, 2018, the Company paid distributions of $3.8 million , which related to distributions declared for September 2018 in the amount of $0.02009589 per share of common stock to stockholders of record as of the close of business on September 20, 2018. On November 1, 2018, the Company paid distributions of $3.9 million , which related to distributions declared for October 2018 in the amount of $0.02076575 per share of common stock to stockholders of record as of the close of business on October 19, 2018. Distributions Authorized On November 5, 2018, the Company’s board of directors authorized a November 2018 distribution in the amount of $0.02009589 per share of common stock to stockholders of record as of the close of business on November 20, 2018, which the Company expects to pay in December 2018, and a December 2018 distribution in the amount of $0.02076575 per share of common stock to stockholders of record as of the close of business on December 19, 2018, which the Company expects to pay in January 2019.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2018
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 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 nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018.
Principles of Consolidation	The consolidated financial statements include the accounts of the Company, KBS REIT Holdings II, the Operating Partnership, and their direct and indirect wholly owned subsidiaries. All significant intercompany balances and transactions are eliminated in consolidation.
Use of Estimates	The preparation of the consolidated financial statements and condensed notes thereto in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and condensed notes. Actual results could materially differ from those estimates.
Per Share Data	Basic net income (loss) per share of common stock is calculated by dividing net income (loss) 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 nine months ended September 30, 2018 and 2017 , respectively.
Segments	The Company invested in core real estate properties and real estate-related investments with the goal of acquiring a portfolio of income-producing investments. The Company’s real estate properties exhibit similar long-term financial performance and have similar economic characteristics to each other. As of September 30, 2018 , the Company aggregated its investments in real estate properties into one reportable business segment.
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 prior periods. During the nine months ended September 30, 2018 , the Company sold three office buildings that were part of an eight -building office campus. As a result, certain assets and liabilities were reclassified to held for sale on the consolidated balance sheets for all periods presented.
Revenue Recognition	Effective January 1, 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”), using the modified retrospective approach, which requires a cumulative effect adjustment as of the date of the Company’s adoption. Under the modified retrospective approach, an entity may also elect to apply this standard to either (i) all contracts as of January 1, 2018 or (ii) only to contracts that were not completed as of January 1, 2018. A completed contract is a contract for which all (or substantially all) of the revenue was recognized under legacy GAAP that was in effect before the date of initial application. The Company elected to apply this standard only to contracts that were not completed as of January 1, 2018. Based on the Company’s evaluation of contracts within the scope of ASU No. 2014-09, revenue that is impacted by ASU No. 2014-09 includes revenue generated by sales of real estate, other operating income and tenant reimbursements for substantial services earned at the Company’s properties. The recognition of such revenue will occur when the services are provided and the performance obligations are satisfied. For the three and nine months ended September 30, 2018 , tenant reimbursements for substantial services accounted for under ASU No. 2014-09 were $0.5 million and $1.3 million and were included in tenant reimbursements on the accompanying statements of operations.
Sale of Real Estate	Prior to January 1, 2018, gains on real estate sold were recognized using the full accrual method at closing when collectibility of the sales price was reasonably assured, the Company was not obligated to perform additional activities that may be considered significant, the initial investment from the buyer was sufficient and other profit recognition criteria had been satisfied. Gain on sales of real estate may have been deferred in whole or in part until the requirements for gain recognition had been met. Effective January 1, 2018, the Company adopted the guidance of ASC 610-20, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (“ASC 610-20”), which applies to sales or transfers to noncustomers of nonfinancial assets or in substance nonfinancial assets that do not meet the definition of a business. Generally, the Company’s sales of real estate would be considered a sale of a nonfinancial asset as defined by ASC 610-20. ASC 610-20 refers to the revenue recognition principles under ASU No. 2014-09. Under ASC 610-20, if the Company determines it does not have a controlling financial interest in the entity that holds the asset and the arrangement meets the criteria to be accounted for as a contract, the Company would derecognize the asset and recognize a gain or loss on the sale of the real estate when control of the underlying asset transfers to the buyer.
Square Footage, Occupancy and Other Measures	Square footage, occupancy, number of tenants and other similar measures, including annualized base rent and annualized base rent per square foot, used to describe real estate investments included in these condensed notes to the consolidated financial statements 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 Update	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 as of its issuance is permitted. ASU No. 2016-02 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. Upon adoption of ASU No. 2016-02, the Company expects to adopt the package of practical expedients for all leases that commenced before the effective date of January 1, 2019. Accordingly, the Company will 1) not reassess whether any expired or existing contracts are or contain leases, 2) not reassess the lease classification for any expired or existing lease, and 3) not reassess initial direct costs for any existing leases. The Company does not expect to elect the practical expedient related to using hindsight to reevaluate the lease term. In addition, the Company expects to adopt the practical expedient for land easements to not assess whether existing or expired land easements that were not previously accounted for as leases under the current lease accounting standards of Topic 840 are or contain a lease under Topic 842. In July 2018, the FASB issued ASU No. 2018-11, Leases (Topic 842), Targeted Improvements (“ASU No. 2018-11”), which provides lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead to account for those components as a single component if the nonlease components otherwise would be accounted for under the new revenue recognition standard (Topic 606) and if certain conditions are met. Upon adoption of the lease accounting standard under Topic 842, the Company expects to adopt this practical expedient, specifically related to its tenant reimbursements which would otherwise be accounted for under the new revenue recognition standard. The Company believes the two conditions have been met for tenant reimbursements as 1) the timing and pattern of transfer of the nonlease components and associated lease components are the same and 2) the lease component would be classified as an operating lease. In addition, ASU No. 2018-11 provides an additional optional transition method to allow entities to apply the new lease accounting standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings. An entity’s reporting for the comparative periods presented in the financial statements in which it adopts the new lease accounting standard will continue to be reported under the current lease accounting standards of Topic 840. The Company expects to adopt this transition method upon adoption of the lease accounting standard of Topic 842 on January 1, 2019. The Company is currently evaluating the impact of adopting the new lease accounting standards on its consolidated financial statements. The Company is in process of creating an inventory of its leases where the Company may be a lessee to assess the potential impact to the Company’s financial statements upon adoption of the new lease accounting standards. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses of Financial Instruments (“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. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework -Changes to the Disclosure Requirements for Fair Value Measurement (“ASU No. 2018-13”). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. ASU No. 2018-13 removes the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for the timing of transfers between levels and the valuation processes for Level 3 fair value measurements. It also adds a requirement to disclose changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and to disclose the range and weighted average of significant unobservable inputs used to develop recurring and nonrecurring Level 3 fair value measurements. For certain unobservable inputs, entities may disclose other quantitative information in lieu of the weighted average if the other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop the Level 3 fair value measurements. In addition, public entities are required to provide information about the measurement uncertainty of recurring Level 3 fair value measurements from the use of significant unobservable inputs if those inputs reasonably could have been different at the reporting date. ASU No. 2018-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Entities are permitted to early adopt either the entire standard or only the provisions that eliminate or modify the requirements. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. The Company is still evaluating the impact of adopting ASU No. 2018-13 on its financial statements, but does not expect the adoption of ASU No. 2018-13 to have a material impact on its financial statements.

REAL ESTATE HELD FOR INVESTME_2

REAL ESTATE HELD FOR INVESTMENT (Tables)	9 Months Ended
	Sep. 30, 2018
Real Estate [Abstract]
Schedule of Real Estate Investments	The following table summarizes the Company’s real estate portfolio as of September 30, 2018 (in thousands): Property Date Acquired City State Property Type Total Real Estate at Cost Accumulated Depreciation and Amortization Total Real Estate, Net 100 & 200 Campus Drive Buildings 09/09/2008 Florham Park NJ Office $ 154,246 $ (15,212 ) $ 139,034 300-600 Campus Drive Buildings 10/10/2008 Florham Park NJ Office 161,577 (20,213 ) 141,364 Willow Oaks Corporate Center 08/26/2009 Fairfax VA Office 108,174 (21,284 ) 86,890 Pierre Laclede Center 02/04/2010 Clayton MO Office 81,738 (12,760 ) 68,978 Union Bank Plaza 09/15/2010 Los Angeles CA Office 185,271 (26,913 ) 158,358 Emerald View at Vista Center 12/09/2010 West Palm Beach FL Office 31,874 (7,760 ) 24,114 Granite Tower 12/16/2010 Denver CO Office 137,362 (29,160 ) 108,202 Fountainhead Plaza 09/13/2011 Tempe AZ Office 119,383 (21,885 ) 97,498 Corporate Technology Centre 03/28/2013 San Jose CA Office 156,032 (23,261 ) 132,771 $ 1,135,657 $ (178,448 ) $ 957,209
Schedules of Concentration of Risk, by Risk Factor	As of September 30, 2018 , the Company had a concentration of credit risk related to the following tenant lease that represented more than 10% of the Company’s annualized base rent: Annualized Base Rent Statistics Tenant Property Tenant Industry Square Feet % of Portfolio (Net Rentable Sq. Ft.) Annualized Base Rent (in thousands) (1) % of Portfolio Annualized Base Rent Annualized Base Rent per Sq. Ft. Lease Expiration (2) (3) Union Bank Union Bank Plaza Finance 295,563 6.5% $ 13,687 11.7% $ 46.31 01/31/2022 _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2018 , 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. (2) Represents the expiration date of the lease as of September 30, 2018 and does not take into account any tenant renewal options. Pursuant to a lease amendment that the Company entered into with Union Bank on December 31, 2017, Union Bank surrendered 15,829 rentable square feet of its total rentable square footage on March 31, 2018 and 31,320 rentable square feet of its total rentable square footage on June 30, 2018. In addition, Union Bank also surrendered 321 parking area passes on March 31, 2018. During the nine months ended September 30, 2018 , the Company received $11.4 million of lease termination fees from Union Bank, of which $2.2 million was recognized as rental income in the accompanying consolidated statements of operations for the nine months ended September 30, 2018 , and $9.2 million was deferred as of September 30, 2018 and included in other liabilities on the accompanying consolidated balance sheets. (3) Union Bank has two options to extend the term of this lease for three, four, five, six or seven years per option term, provided that the combined renewal option terms do not exceed 10 years. If Union Bank elects to exercise its extension options, it must extend the lease on (i) the entire office premises or (ii) no less than 200,000 rentable square feet consisting of full floors only plus either all or none of both the retail and vault space. 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 Finance 31 $ 26,739 22.9 % Legal Services 33 15,017 12.9 % Mining, Oil & Gas Extraction 4 13,674 11.7 % Computer System Design & Programming 3 11,895 10.2 % $ 67,325 57.7 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2018 , 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. As of September 30, 2018 , the following properties represented more than 10% of the Company’s total assets: Property Location Rentable Square Feet Total Real Estate, Net (in thousands) Percentage of Total Assets Annualized Base Rent (in thousands) (1) Average Annualized Base Rent per Sq. Ft. Occupancy Union Bank Plaza Los Angeles, CA 627,334 $ 158,358 13.9 % $ 20,321 $ 43.32 75 % 300-600 Campus Drive Buildings Florham Park, NJ 578,424 141,364 12.4 % 17,865 33.63 92 % 100 & 200 Campus Drive Buildings Florham Park, NJ 590,458 139,034 12.2 % 13,107 31.59 70 % Corporate Technology Centre San Jose, CA 415,700 132,771 11.7 % 10,938 34.29 77 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of September 30, 2018 , 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.
Schedule of Future Minimum Rental Income for Company's Properties	As of September 30, 2018 , the future minimum rental income from the Company’s properties under non-cancelable operating leases was as follows (in thousands): October 1, 2018 through December 31, 2018 $ 26,911 2019 104,973 2020 99,932 2021 88,416 2022 66,238 Thereafter 219,161 $ 605,631

TENANT ORIGINATION AND ABSORP_2

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2018
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, 2018 and December 31, 2017 , 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 $ 41,568 $ 53,901 $ 12,804 $ 13,650 $ (5,011 ) $ (6,703 ) Accumulated amortization (26,375 ) (33,042 ) (12,383 ) (11,532 ) 4,589 5,719 Net amount $ 15,193 $ 20,859 $ 421 $ 2,118 $ (422 ) $ (984 )
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, 2018 and 2017 were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Three Months Ended September 30, For the Three Months Ended September 30, For the Three Months Ended September 30, 2018 2017 2018 2017 2018 2017 Amortization $ (1,410 ) $ (2,281 ) $ (555 ) $ (593 ) $ 144 $ 383 Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Nine Months Ended September 30, For the Nine Months Ended September 30, For the Nine Months Ended September 30, 2018 2017 2018 2017 2018 2017 Amortization $ (5,815 ) $ (7,218 ) $ (1,697 ) $ (1,765 ) $ 749 $ 1,225

REAL ESTATE LOAN RECEIVABLE (Ta

REAL ESTATE LOAN RECEIVABLE (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Schedule of Real Estate Loans Receivable	As of December 31, 2017 , the Company, through an indirect wholly owned subsidiary, had originated the following real estate loan receivable, which was paid off in full on June 1, 2018 (dollars in thousands): Loan Name Location of Related Property or Collateral Date Acquired/ Originated Property Type Loan Type Outstanding Principal Balance as of September 30, 2018 Book Value as of September 30, 2018 (1) Book Value as of December 31, 2017 (1) Contractual Interest Rate Annualized Effective Interest Rate Maturity Date Sheraton Charlotte Airport Hotel First Mortgage (2) Charlotte, North Carolina 07/11/2011 Hotel Mortgage $ — $ — $ 13,923 (2) (2) (2) _____________________ (1) Book value represents outstanding principal balance, adjusted for unamortized acquisition discounts, origination fees and direct origination and acquisition costs. (2) On June 1, 2018, the borrower under the Sheraton Charlotte Airport Hotel First Mortgage paid off the entire principal balance due to the Company. The Sheraton Charlotte Airport Hotel First Mortgage had a maturity date of August 1, 2018. The Sheraton Charlotte Airport Hotel First Mortgage bore interest at a fixed rate of 7.5% .
Schedule of Activity Related to Real Estate Loans Receivable	The following summarizes the activity related to the real estate loan receivable for the nine months ended September 30, 2018 (in thousands): Real estate loan receivable - December 31, 2017 $ 13,923 Principal repayments received on the real estate loan receivable (13,920 ) Amortization of closing costs and origination fees on the real estate loan receivable (3 ) Real estate loan receivable - September 30, 2018 $ —
Schedule of Interest Income from Real Estate Loans Receivable	For the three and nine months ended September 30, 2018 and 2017 , interest income from the real estate loan receivable consisted of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Contractual interest income $ — $ 268 $ 437 $ 798 Amortization of closing costs and origination fees — (1 ) (3 ) (3 ) Interest income from real estate loan receivable $ — $ 267 $ 434 $ 795

REAL ESTATE HELD FOR SALE (Tabl

REAL ESTATE HELD FOR SALE (Tables)	9 Months Ended
	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Revenue and Expenses of Real Estate Disposed of by Sale	The following table summarizes certain revenue and expenses related to the Company’s real estate properties that were sold during the year ended December 31, 2017 and nine months ended September 30, 2018 , which were included in continuing operations (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Revenues Rental income $ — $ 1,701 $ 2,253 $ 8,747 Tenant reimbursements (79 ) 484 378 1,981 Total revenues (79 ) 2,185 2,631 10,728 Expenses Operating, maintenance, and management 11 235 131 1,415 Real estate taxes and insurance (106 ) 444 278 1,639 Asset management fees to affiliate — 241 222 884 General and administrative expenses 15 55 29 78 Depreciation and amortization (3 ) 814 720 2,753 Interest expense — 576 588 1,752 Total expenses $ (83 ) $ 2,365 $ 1,968 $ 8,521
Schedule of Assets and Liabilities of Real Estate Held-for-Sale	The following summary presents the major components of assets and liabilities related to real estate held for sale as of December 31, 2017 (in thousands). No real estate properties were held for sale as of September 30, 2018 . September 30, 2018 December 31, 2017 Assets related to real estate held for sale Total real estate, at cost $ — $ 76,921 Accumulated depreciation and amortization — (10,204 ) Real estate held for sale, net — 66,717 Other assets — 2,927 Total assets related to real estate held for sale $ — $ 69,644 Liabilities related to real estate held for sale Notes payable, net — 94,580 Other liabilities — 320 Total liabilities related to real estate held for sale $ — $ 94,900

NOTES PAYABLE (Tables)

NOTES PAYABLE (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Payable [Abstract]
Schedule of Long-term Debt Instruments	As of September 30, 2018 and December 31, 2017 , the Company’s notes payable, including notes payable related to real estate held for sale as of December 31, 2017 , consisted of the following (dollars in thousands): Book Value as of September 30, 2018 Book Value as of December 31, 2017 Contractual Interest Rate as of September 30, 2018 (1) Effective Interest Rate as of September 30, 2018 (1) Payment Type Maturity Date (2) Amended and Restated Portfolio Revolving Loan Facility (3) $ — $ 52,638 (3) (3) (3) (3) Union Bank Plaza Mortgage Loan (3) — 105,000 (3) (3) (3) (3) Portfolio Mortgage Loan #1 (3) — 59,651 (3) (3) (3) (3) Portfolio Mortgage Loan #3 (3) — 54,000 (3) (3) (3) (3) Corporate Technology Centre Mortgage Loan (4) 42,187 138,219 3.50% 3.5% Principal & Interest 04/01/2020 300-600 Campus Drive Revolving Loan (3) — 93,125 (3) (3) (3) (3) Portfolio Loan Facility (5) 375,000 — One-month LIBOR + 1.45% 3.6% Interest Only 03/29/2020 Total notes payable principal outstanding $ 417,187 $ 502,633 Deferred financing costs, net (1,992 ) (334 ) Total notes payable, net $ 415,195 $ 502,299 _____________________ (1) Contractual interest rate represents the interest rate in effect under the loan as of September 30, 2018 . Effective interest rate is calculated as the actual interest rate in effect as of September 30, 2018 , using interest rate indices as of September 30, 2018 , where applicable. (2) Represents the initial maturity date or the maturity date as extended as of September 30, 2018 ; subject to certain conditions, the maturity dates of certain loans may be extended beyond the maturity date shown. (3) On March 29, 2018, the Company paid off the outstanding balances under these loans with proceeds from the Portfolio Loan Facility. See footnote (5) below. (4) In connection with the sales of three of the eight buildings at Corporate Technology Centre during the nine months ended September 30, 2018 , the Company made a partial paydown on the Corporate Technology Centre Mortgage Loan. (5) On March 29, 2018, the Company, through indirect wholly owned subsidiaries, entered into a loan facility (the “Portfolio Loan Facility”) for an amount of up to $500.0 million , of which $375.0 million is term debt and $125.0 million is revolving debt. The Portfolio Loan Facility was used to pay off the Amended and Restated Portfolio Revolving Loan Facility, the Union Bank Plaza Mortgage Loan, Portfolio Mortgage Loan #1, Portfolio Mortgage Loan #3 and the 300-600 Campus Drive Revolving Loan. The Portfolio Loan Facility is secured by the 100 & 200 Campus Drive Buildings, the 300-600 Campus Drive Buildings, Willow Oaks Corporate Center, Pierre Laclede Center, Union Bank Plaza, Emerald View at Vista Center, Granite Tower and Fountainhead Plaza. As of September 30, 2018 , $375.0 million of term debt of the Portfolio Loan Facility was outstanding and $125.0 million of revolving debt remained available for future disbursements, subject to certain terms and conditions set forth in the loan documents.
Schedule of Maturities of Long-term Debt	The following is a schedule of maturities, including principal amortization payments, for all notes payable outstanding as of September 30, 2018 (in thousands): October 1, 2018 through December 31, 2018 $ 319 2019 1,304 2020 415,564 $ 417,187

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	9 Months Ended
	Sep. 30, 2018
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 real estate loan receivable and notes payable as of September 30, 2018 and December 31, 2017 , which carrying amounts do not generally approximate the fair values (in thousands): September 30, 2018 December 31, 2017 Face Value Carrying Amount Fair Value Face Value Carrying Amount Fair Value Financial assets: Real estate loan receivable $ — $ — $ — $ 13,921 $ 13,923 $ 13,960 Financial liabilities: Notes payable $ 417,187 $ 415,195 $ 416,252 $ 502,633 $ 502,299 $ 500,683

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	9 Months Ended
	Sep. 30, 2018
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, 2018 and 2017 , respectively, and any related amounts payable as of September 30, 2018 and December 31, 2017 (in thousands): Incurred Payable as of Three Months Ended September 30, Nine Months Ended September 30, September 30, December 31, 2018 2017 2018 2017 2018 2017 Expensed Asset management fees $ 2,688 $ 2,899 $ 8,192 $ 8,746 $ — $ — Reimbursement of operating expenses (1) 69 63 246 188 113 84 Disposition fees (2) — — 972 470 — — $ 2,757 $ 2,962 $ 9,410 $ 9,404 $ 113 $ 84 _____________________ (1) Reimbursable operating expenses primarily consists of internal audit personnel costs, accounting software and cybersecurity related expenses incurred by the Advisor 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 $53,000 and $63,000 for the three months ended September 30, 2018 and 2017 , respectively, and $181,000 and $167,000 for the nine months ended September 30, 2018 and 2017 , respectively, and were the only type of employee costs reimbursed under the Advisory Agreement for the nine months ended September 30, 2018 and 2017 . 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, net, in the accompanying consolidated statements of operations.

ORGANIZATION (Details)

ORGANIZATION (Details) $ in Thousands	9 Months Ended	12 Months Ended	35 Months Ended	125 Months Ended
	Sep. 30, 2018USD ($)propertyshares	Dec. 31, 2017USD ($)shares	Mar. 22, 2011USD ($)shares	Sep. 30, 2018USD ($)propertyshares
Organizational Structure [Line Items]
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 | $			$ 1,800,000
Shares of common stock sold under dividend reinvestment plan, value | $				$ 298,200
Redemptions of common stock | $	$ 4,502	$ 5,767
Common Stock
Organizational Structure [Line Items]
Issuance of common stock, shares | shares			182,681,633
Shares of common stock sold under dividend reinvestment plan, shares | shares				30,903,504
Redemptions of common stock (in shares) | shares	920,643	1,053,650		26,859,478
Redemptions of common stock | $	$ 9	$ 10		$ 250,300
KBS Capital Advisors LLC
Organizational Structure [Line Items]
Period of Advisory Agreement renewal	1 year
Period of termination notice	60 days
KBS Capital Advisors LLC | Common Stock
Organizational Structure [Line Items]
Shares held by affiliate | shares	20,000			20,000
Office Properties
Organizational Structure [Line Items]
Number of real estate properties | property	8			8
Office Campus
Organizational Structure [Line Items]
Number of real estate properties | property	1			1
Office Buildings, Campus
Organizational Structure [Line Items]
Number of real estate properties | property	5			5

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018USD ($)property$ / shares	Sep. 30, 2017USD ($)$ / shares	Sep. 30, 2018USD ($)segmentproperty$ / shares	Sep. 30, 2017USD ($)$ / shares	Dec. 31, 2016segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Tenant reimbursements	$ 2,558	$ 3,401	$ 9,027	$ 10,842
Distributions declared per common share (in dollars per share) | $ / shares	$ 0.062	$ 0.069	$ 0.183	$ 0.205
Number of reportable segments | segment			1		1
Office Properties
Real Estate [Line Items]
Number of real estate properties | property	8		8
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Tenant reimbursements	$ 500		$ 1,300

REAL ESTATE HELD FOR INVESTME_3

REAL ESTATE HELD FOR INVESTMENT (Narrative) (Details) ft² in Millions	Sep. 30, 2018ft²property
Real Estate Properties [Line Items]
Occupancy	81.00%
Office Properties
Real Estate Properties [Line Items]
Number of real estate properties	8
Office Buildings, Campus
Real Estate Properties [Line Items]
Number of real estate properties	5
Rentable square feet | ft²	4.5
Office Buildings, Campus | Excluding Held-for-sale
Real Estate Properties [Line Items]
Number of real estate properties	5

REAL ESTATE HELD FOR INVESTME_4

REAL ESTATE HELD FOR INVESTMENT (Schedule of Real Estate Investments) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Real Estate Properties [Line Items]
Total Real Estate at Cost	$ 1,135,657	$ 1,130,524
Accumulated Depreciation and Amortization	(178,448)	(166,372)
Total real estate held for investment, net	957,209	$ 964,152
Office Properties
Real Estate Properties [Line Items]
Total Real Estate at Cost	1,135,657
Accumulated Depreciation and Amortization	(178,448)
Total real estate held for investment, net	$ 957,209
100 & 200 Campus Drive Buildings | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Sep. 9, 2008
Total Real Estate at Cost	$ 154,246
Accumulated Depreciation and Amortization	(15,212)
Total real estate held for investment, net	$ 139,034
300-600 Campus Drive Buildings | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Oct. 10, 2008
Total Real Estate at Cost	$ 161,577
Accumulated Depreciation and Amortization	(20,213)
Total real estate held for investment, net	$ 141,364
Willow Oaks Corporate Center | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Aug. 26, 2009
Total Real Estate at Cost	$ 108,174
Accumulated Depreciation and Amortization	(21,284)
Total real estate held for investment, net	$ 86,890
Pierre Laclede Center | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Feb. 4, 2010
Total Real Estate at Cost	$ 81,738
Accumulated Depreciation and Amortization	(12,760)
Total real estate held for investment, net	$ 68,978
Union Bank Plaza | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Sep. 15, 2010
Total Real Estate at Cost	$ 185,271
Accumulated Depreciation and Amortization	(26,913)
Total real estate held for investment, net	$ 158,358
Emerald View at Vista Center | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Dec. 9, 2010
Total Real Estate at Cost	$ 31,874
Accumulated Depreciation and Amortization	(7,760)
Total real estate held for investment, net	$ 24,114
Granite Tower | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Dec. 16, 2010
Total Real Estate at Cost	$ 137,362
Accumulated Depreciation and Amortization	(29,160)
Total real estate held for investment, net	$ 108,202
Fountainhead Plaza | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Sep. 13, 2011
Total Real Estate at Cost	$ 119,383
Accumulated Depreciation and Amortization	(21,885)
Total real estate held for investment, net	$ 97,498
Corporate Technology Centre | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Mar. 28, 2013
Total Real Estate at Cost	$ 156,032
Accumulated Depreciation and Amortization	(23,261)
Total real estate held for investment, net	$ 132,771

REAL ESTATE HELD FOR INVESTME_5

REAL ESTATE HELD FOR INVESTMENT (Properties Represented More than 10% of Company’s Total Assets) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)ft²$ / ft²	Dec. 31, 2017USD ($)
Real Estate Properties [Line Items]
Total Real Estate, Net	$ 957,209	$ 964,152
Percentage of Total Assets	57.70%
Annualized Base Rent	$ 67,325
Occupancy	81.00%
Assets, Total | Union Bank Plaza
Real Estate Properties [Line Items]
Rentable Square Feet | ft²	627,334
Total Real Estate, Net	$ 158,358
Percentage of Total Assets	13.90%
Annualized Base Rent	$ 20,321
Average Annualized Base Rent per Sq. Ft. | $ / ft²	43.32
Occupancy	75.00%
Assets, Total | 300-600 Campus Drive Buildings
Real Estate Properties [Line Items]
Rentable Square Feet | ft²	578,424
Total Real Estate, Net	$ 141,364
Percentage of Total Assets	12.40%
Annualized Base Rent	$ 17,865
Average Annualized Base Rent per Sq. Ft. | $ / ft²	33.63
Occupancy	92.00%
Assets, Total | 100 & 200 Campus Drive Buildings
Real Estate Properties [Line Items]
Rentable Square Feet | ft²	590,458
Total Real Estate, Net	$ 139,034
Percentage of Total Assets	12.20%
Annualized Base Rent	$ 13,107
Average Annualized Base Rent per Sq. Ft. | $ / ft²	31.59
Occupancy	70.00%
Assets, Total | Corporate Technology Centre
Real Estate Properties [Line Items]
Rentable Square Feet | ft²	415,700
Total Real Estate, Net	$ 132,771
Percentage of Total Assets	11.70%
Annualized Base Rent	$ 10,938
Average Annualized Base Rent per Sq. Ft. | $ / ft²	34.29
Occupancy	77.00%

REAL ESTATE HELD FOR INVESTME_6

REAL ESTATE HELD FOR INVESTMENT (Operating Leases) (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)tenant	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Operating Leased Assets [Line Items]
Deferred rent recognized	$ (3,096)	$ 1,549
Deferred rent receivables	55,900		$ 57,600
Unamortized lease incentives	$ 9,600		9,500
Number of tenants | tenant	182
Recorded bad debt expense related to tenant	$ 213	$ 264
Bad debt reserve	300
Other liabilities, at fair value
Operating Leased Assets [Line Items]
Security deposit liability	$ 2,600		$ 2,600
Maximum
Operating Leased Assets [Line Items]
Operating lease, term	13 years 1 month 6 days
Bad debt reserve of annualized base rent	1.00%
Weighted Average
Operating Leased Assets [Line Items]
Operating lease, term	4 years 9 months 18 days

REAL ESTATE HELD FOR INVESTME_7

REAL ESTATE HELD FOR INVESTMENT (Future Minimum Rental Income) (Details) $ in Thousands	Sep. 30, 2018USD ($)
Real Estate [Abstract]
October 1, 2018 through December 31, 2018	$ 26,911
2,019	104,973
2,020	99,932
2,021	88,416
2,022	66,238
Thereafter	219,161
Future minimum rental income	$ 605,631

REAL ESTATE HELD FOR INVESTME_8

REAL ESTATE HELD FOR INVESTMENT (Highest Tenant Industry Concentrations- Grater than 10% of Annual Base Rent) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)tenant
Concentration Risk [Line Items]
Number of Tenants | tenant	182
Annualized Base Rent | $	$ 67,325
Percentage of Annualized Base Rent	57.70%
Finance
Concentration Risk [Line Items]
Number of Tenants | tenant	31
Annualized Base Rent | $	$ 26,739
Percentage of Annualized Base Rent	22.90%
Legal Services
Concentration Risk [Line Items]
Number of Tenants | tenant	33
Annualized Base Rent | $	$ 15,017
Percentage of Annualized Base Rent	12.90%
Mining, Oil & Gas Extraction
Concentration Risk [Line Items]
Number of Tenants | tenant	4
Annualized Base Rent | $	$ 13,674
Percentage of Annualized Base Rent	11.70%
Computer System Design & Programming
Concentration Risk [Line Items]
Number of Tenants | tenant	3
Annualized Base Rent | $	$ 11,895
Percentage of Annualized Base Rent	10.20%

REAL ESTATE HELD FOR INVESTME_9

REAL ESTATE HELD FOR INVESTMENT (Concentration of Credit Risk for Tenant Leases) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)ft²$ / ft²	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)ft²extension$ / ft²	Sep. 30, 2017USD ($)	Jun. 30, 2018ft²	Mar. 31, 2018ft²
Real Estate Properties [Line Items]
Annualized Base Rent	$ 67,325		$ 67,325
Rental income	$ 28,415	$ 30,649	$ 88,007	$ 95,384
Tenant Lease - Union Bank Plaza
Real Estate Properties [Line Items]
Square Feet | ft²	295,563		295,563
% of Portfolio (Net Rentable Sq. Ft.)	6.50%		6.50%
Annualized Base Rent	$ 13,687		$ 13,687
% of Portfolio Annualized Base Rent	11.70%		11.70%
Annualized Base Rent per Sq. Ft. | $ / ft²	46.31		46.31
Square feet surrender | ft²					31,320	15,829
Termination of lease			$ 11,400
Rental income			$ 2,200
Extension option | extension			2
Tenant Lease - Union Bank Plaza | Maximum
Real Estate Properties [Line Items]
Extension period			10 years
Tenant Lease - Union Bank Plaza | Minimum
Real Estate Properties [Line Items]
Rentable area required for extension option (less than) | ft²	200,000		200,000
Tenant Lease - Union Bank Plaza | Other Liabilities
Real Estate Properties [Line Items]
Deferred revenue	$ 9,200		$ 9,200

REAL ESTATE HELD FOR INVESTM_10

REAL ESTATE HELD FOR INVESTMENT (Geographic Concentration Risk) (Details)	9 Months Ended
	Sep. 30, 2018
Concentration Risk [Line Items]
Concentration risk, percentage	57.70%
Assets, Total | California
Concentration Risk [Line Items]
Concentration risk, percentage	25.60%
Assets, Total | New Jersey
Concentration Risk [Line Items]
Concentration risk, percentage	24.60%

TENANT ORIGINATION AND ABSORP_3

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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
Tenant Origination And Absorption Costs, Cost	$ 41,568		$ 41,568		$ 53,901
Tenant Origination and Absorption Costs, Accumulated amortization	(26,375)		(26,375)		(33,042)
Tenant Origination and Absorption Costs, Net amount	15,193		15,193		20,859
Tenant Origination and Absorption Costs, Amortization	(1,410)	$ (2,281)	(5,815)	$ (7,218)
Above-Market Lease Assets, Cost	12,804		12,804		13,650
Above-Market Lease Assets, Accumulated amortization	(12,383)		(12,383)		(11,532)
Above-Market Lease Assets, Net amount	421		421		2,118
Above-Market Lease Assets, Amortization	(555)	(593)	(1,697)	(1,765)
Below-Market Lease Liabilities, Cost	(5,011)		(5,011)		(6,703)
Below-Market Lease Liabilities, Accumulated amortization	4,589		4,589		5,719
Below-Market Lease Liabilities, Net amount	(422)		(422)		$ (984)
Below-Market Lease Liabilities, Amortization	$ 144	$ 383	$ 749	$ 1,225

REAL ESTATE LOAN RECEIVABLE (Sc

REAL ESTATE LOAN RECEIVABLE (Schedule of Real Estate Loans Receivable) (Details) - USD ($) $ in Thousands	Jun. 01, 2018	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Book Value		$ 0	$ 13,923
Mortgage | Sheraton Charlotte Airport Hotel First Mortgage Charlotte, North Carolina
Accounts, Notes, Loans and Financing Receivable [Line Items]
Date Acquired		Jul. 11, 2011
Outstanding Principal Balance		$ 0
Book Value		$ 0	$ 13,923
Contractual Interest Rate	7.50%

REAL ESTATE LOAN RECEIVABLE (_2

REAL ESTATE LOAN RECEIVABLE (Schedule of Activity Related to Real Estate Loans Receivable) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Real Estate Loans Receivable [Roll Forward]
Real estate loan receivable - December 31, 2017			$ 13,923
Principal repayments received on the real estate loan receivable			(13,920)	$ (112)
Amortization of closing costs and origination fees on the real estate loan receivable	$ 0	$ (1)	(3)	$ (3)
Real estate loan receivable - September 30, 2018	$ 0		$ 0

REAL ESTATE LOAN RECEIVABLE (_3

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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Receivables [Abstract]
Contractual interest income	$ 0	$ 268	$ 437	$ 798
Amortization of closing costs and origination fees	0	(1)	(3)	(3)
Interest income from real estate loan receivable	$ 0	$ 267	$ 434	$ 795

REAL ESTATE HELD FOR SALE (Narr

REAL ESTATE HELD FOR SALE (Narrative) (Details) - property	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Held-for-sale
Real Estate Properties [Line Items]
Number of real estate properties	0
Office Properties
Real Estate Properties [Line Items]
Number of real estate properties	8
Office Properties | Disposed of by Sale
Real Estate Properties [Line Items]
Number of real estate properties sold	3
Number of real estate properties	8
Number of real estate properties sold		2

REAL ESTATE HELD FOR SALE (Reve

REAL ESTATE HELD FOR SALE (Revenue and Expenses of Real Estate Held-for-Sale) (Details) - Disposed of by Sale - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Rental income	$ 0	$ 1,701	$ 2,253	$ 8,747
Tenant reimbursements	(79)	484	378	1,981
Total revenues	(79)	2,185	2,631	10,728
Expenses
Operating, maintenance, and management	11	235	131	1,415
Real estate taxes and insurance	(106)	444	278	1,639
Asset management fees to affiliate	0	241	222	884
General and administrative expenses	15	55	29	78
Depreciation and amortization	(3)	814	720	2,753
Interest expense	0	576	588	1,752
Total expenses	$ (83)	$ 2,365	$ 1,968	$ 8,521

REAL ESTATE HELD FOR SALE (Sche

REAL ESTATE HELD FOR SALE (Schedule of Assets and Liabilities Related to Real Estate Held for Sale) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Liabilities related to real estate held for sale
Total liabilities related to real estate held for sale	$ 0	$ 94,580
Held-for-sale
Assets related to real estate held for sale
Total real estate, at cost	0	76,921
Accumulated depreciation and amortization	0	(10,204)
Real estate held for sale, net	0	66,717
Other assets	0	2,927
Total assets related to real estate held for sale	0	69,644
Liabilities related to real estate held for sale
Notes payable, net	0	94,580
Other liabilities	0	320
Total liabilities related to real estate held for sale	$ 0	$ 94,900

NOTES PAYABLE (Schedule of Long

NOTES PAYABLE (Schedule of Long-term Debt Instruments) (Details)	Mar. 29, 2018USD ($)	Sep. 30, 2018USD ($)property	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Total notes payable principal outstanding		$ 417,187,000	$ 502,633,000
Deferred financing costs, net		(1,992,000)	(334,000)
Total notes payable, net		415,195,000	502,299,000
Debt instrument, face amount		$ 417,187,000	502,633,000
Office Properties
Debt Instrument [Line Items]
Number of real estate properties | property		8
Disposed of by Sale | Office Properties
Debt Instrument [Line Items]
Number of real estate properties sold | property		3
Number of real estate properties | property		8
Portfolio Loan Facility | Secured Debt
Debt Instrument [Line Items]
Total notes payable principal outstanding		$ 375,000,000
Remaining borrowing capacity		125,000,000
Mortgage | Amended and Restated Portfolio Revolving Loan Facility
Debt Instrument [Line Items]
Total notes payable principal outstanding		0	52,638,000
Mortgage | Union Bank Plaza Mortgage Loan
Debt Instrument [Line Items]
Total notes payable principal outstanding		0	105,000,000
Mortgage | Portfolio Mortgage Loan 1
Debt Instrument [Line Items]
Total notes payable principal outstanding		0	59,651,000
Mortgage | Portfolio Mortgage Loan 3
Debt Instrument [Line Items]
Total notes payable principal outstanding		0	54,000,000
Mortgage | Corporate Technology Centre Mortgage Loan
Debt Instrument [Line Items]
Total notes payable principal outstanding		$ 42,187,000	138,219,000
Contractual Interest Rate		3.50%
Effective Interest Rate		3.50%
Maturity Date		Apr. 1, 2020
Mortgage | 300-600 Campus Drive Revolving Loan
Debt Instrument [Line Items]
Total notes payable principal outstanding		$ 0	93,125,000
Mortgage | Portfolio Loan Facility
Debt Instrument [Line Items]
Total notes payable principal outstanding		$ 375,000,000	$ 0
Effective Interest Rate		3.60%
Maturity Date		Mar. 29, 2020
Debt instrument, face amount	$ 500,000,000
Mortgage | Portfolio Loan Facility | One-month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.45%	1.45%
Secured Debt | Portfolio Loan Facility
Debt Instrument [Line Items]
Total notes payable, net	$ 375,000,000
Secured Debt | Portfolio Loan Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 125,000,000

NOTES PAYABLE (Narrative) (Deta

NOTES PAYABLE (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Notes Payable [Abstract]
Interest expense	$ 4,175	$ 4,558	$ 13,494	$ 12,947
Interest payable, current	1,300		1,300		$ 1,400
Amortization of deferred financing costs	$ 300	$ 200	940	$ 841
Debt refinancing costs			$ 300

NOTES PAYABLE (Schedule of Matu

NOTES PAYABLE (Schedule of Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Notes Payable [Abstract]
October 1, 2018 through December 31, 2018	$ 319
2,019	1,304
2,020	415,564
Total notes payable, net	$ 417,187	$ 502,633

FAIR VALUE DISCLOSURES (Schedul

FAIR VALUE DISCLOSURES (Schedule of Face Value, Carrying Amounts and Fair Value) (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate loan receivable, Face Value	$ 0	$ 13,921,000
Notes payable, Face Value	417,187,000	502,633,000
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate loans receivable, Value	0	13,923,000
Notes payable, Value	415,195,000	502,299,000
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate loans receivable, Value	0	13,960,000
Notes payable, Value	$ 416,252,000	$ 500,683,000

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Payable as of	$ 113		$ 113		$ 84
Administrative fees	53	$ 63	181	$ 167
Advisor and Dealer Manager
Related Party Transaction [Line Items]
Expenses	2,757	2,962	9,410	9,404
Payable as of	113		113		84
Advisor and Dealer Manager | Asset management fees
Related Party Transaction [Line Items]
Expenses	2,688	2,899	8,192	8,746
Payable as of	0		0		0
Advisor and Dealer Manager | Reimbursement of operating expenses
Related Party Transaction [Line Items]
Expenses	69	63	246	188
Payable as of	113		113		84
Advisor and Dealer Manager | Disposition fees
Related Party Transaction [Line Items]
Expenses	0	$ 0	972	470
Payable as of	$ 0		0		$ 0
KBS Capital Advisors LLC | Property Insurance Rebate
Related Party Transaction [Line Items]
Paid from related parties			$ 100	$ 100

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 19, 2018	Nov. 20, 2018	Nov. 01, 2018	Oct. 19, 2018	Oct. 01, 2018	Sep. 20, 2018
Scenario, Forecast
Subsequent Event [Line Items]
Distribution rate per share per day, declared	$ 0.02076575	$ 0.02009589
Dividend Paid
Subsequent Event [Line Items]
Distribution rate per share per day, declared						$ 0.02009589
Subsequent Event | Dividend Paid
Subsequent Event [Line Items]
Paid distributions			$ 3.9		$ 3.8
Distribution rate per share per day, declared				$ 0.02076575