Summary of Significant Accounting Policies | Summary of Significant Accounting Policies The summary of significant accounting policies presented below is designed to assist in understanding the Company’s condensed consolidated financial statements. Such condensed consolidated financial statements and the accompanying notes thereto are the representation of management. These accounting policies conform to United States generally accepted accounting principles, or GAAP, for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments, consisting of a normal and recurring nature considered for a fair presentation, have been included. Operating results for the three months ended March 31, 2019 , are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 . The condensed consolidated balance sheet at December 31, 2018 , has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by GAAP for complete financial statements. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s audited consolidated financial statements as of and for the year ended December 31, 2018 , and related notes thereto set forth in the Company’s Annual Report on Form 10-K, filed with the SEC on March 22, 2019. Principles of Consolidation and Basis of Presentation The accompanying condensed consolidated financial statements include the accounts of the Company, the Operating Partnership, and all wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of the condensed consolidated financial statements and accompanying notes in conformity with GAAP requires the Company to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates are made and evaluated on an ongoing basis using information that is currently available as well as various other assumptions believed to be reasonable under the circumstances. Actual results could differ from those estimates. Restricted Cash Restricted cash consists of restricted cash held in escrow and restricted bank deposits. Restricted cash held in escrow includes cash held by lenders in escrow accounts for tenant and capital improvements, repairs and maintenance and other lender reserves for certain properties, in accordance with the respective lender’s loan agreement. Restricted cash held in escrow is reported in other assets, net, in the accompanying condensed consolidated balance sheets . Restricted bank deposits consist of tenant receipts for certain properties which are required to be deposited into lender-controlled accounts in accordance with the respective lender's loan agreement. Restricted bank deposits are reported in other assets, net, in the accompanying condensed consolidated balance sheets . See Note 6—"Other Assets, Net" . The following table presents a reconciliation of the beginning of period and end of period cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets to the totals shown in the condensed consolidated statements of cash flows (amounts in thousands): Three Months Ended Beginning of period: 2019 2018 Cash and cash equivalents 68,360 74,803 Restricted cash 11,167 10,944 Cash, cash equivalents and restricted cash $ 79,527 $ 85,747 End of period: Cash and cash equivalents 73,727 76,734 Restricted cash 11,614 12,885 Cash, cash equivalents and restricted cash $ 85,341 $ 89,619 Impairment of Long Lived Assets The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets may not be recoverable. When indicators of potential impairment suggest that the carrying value of real estate and related intangible assets may not be recoverable, the Company assesses the recoverability of the assets by estimating whether the Company will recover the carrying value of the assets through its undiscounted future cash flows and their eventual disposition. If, based on this analysis, the Company does not believe that it will be able to recover the carrying value of the assets, the Company will record an impairment loss to the extent that the carrying value exceeds the estimated fair value of the assets. When developing estimates of expected future cash flows, the Company makes certain assumptions regarding future market rental income amounts subsequent to the expiration of current lease arrangements, property operating expenses, terminal capitalization and discount rates, the expected number of months it takes to re-lease the property, required tenant improvements and the number of years the property will be held for investment. The use of alternative assumptions in the future cash flow analysis could result in a different determination of the property’s future cash flows and a different conclusion regarding the existence of an impairment, the extent of such loss, as well as the carrying value of the real estate and related assets. In addition, the Company applies a market approach using comparable sales for certain properties. The use of alternative assumptions in the market approach analysis could result in a different determination of the property’s estimated fair value and a different conclusion regarding the existence of an impairment, the extent of such loss, if any, as well as the carrying value of the real estate and related assets. Impairment of Acquired Intangible Assets For the three months ended March 31, 2019 , the Company recognized an impairment of one in-place lease intangible asset in the amount of approximately $2,658,000 , related to a healthcare tenant of the Company experiencing financial difficulties, by accelerating the amortization of the intangible asset. Revenue Recognition, Tenant Receivables and Allowance for Uncollectible Accounts Effective January 1, 2018, the Company recognizes non-rental related revenue in accordance with Accounting Standards Codification, or ASC, 606, Revenue from Contracts with Customers , or ASC 606. The Company has identified its revenue streams as rental income from leasing arrangements and tenant reimbursements, which are outside the scope of ASC 606. The core principle of ASC 606 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Non-rental revenue, subject to ASC 606, is immaterial to the Company's condensed consolidated financial statements. The majority of the Company's revenue is derived from rental revenue which is accounted for in accordance with ASC 842, Leases, or ASC 842. In accordance with ASC 842, minimum rental revenue is recognized on a straight-line basis over the term of the related lease (including rent holidays). For lease arrangements when it is not probable that the Company will collect all or substantially all of the remaining lease payments under the term of the lease, rental revenue is limited to the lesser of the rental revenue that would be recognized on a straight-line basis or the lease payments that have been collected from the lessee. Differences between rental income recognized and amounts contractually due under the lease agreements are credited or charged to straight-line rent receivable or straight-line rent liability, as applicable. Tenant reimbursements, which are comprised of additional amounts recoverable from tenants for common area maintenance expenses and certain other recoverable expenses, is recognized when the services are provided and the performance obligations are satisfied. Prior to the adoption of ASC 842, tenant receivables and straight-line rent receivables were carried net of the provision for credit losses. The provision for credit losses was established for estimated losses resulting from the inability of certain tenants to meet the contractual obligations under their lease agreements. The Company’s determination of the adequacy of these provisions was based primarily upon evaluations of historical loss experience, the tenant’s financial condition, security deposits, letters of credit, lease guarantees, current economic conditions and other relevant factors. Effective January 1, 2019, upon adoption of ASC 842, the Company is no longer recording a provision for credit losses but is, instead, assessing whether or not it is probable that the Company will collect all or substantially all of the remaining lease payments under the term of the lease. Where it is not probable that the Company will collect all or substantially all of the remaining lease payments under the term of the lease, rental revenue is limited to the lesser of the rental revenue that would be recognized on a straight-line basis or the lease payments that have been collected from the lessee. For the three months ended March 31, 2019 , the Company recorded $445,000 as a reduction in rental revenue in the accompanying condensed consolidated statements of comprehensive income . Concentration of Credit Risk and Significant Leases As of March 31, 2019 , the Company had cash on deposit, including restricted cash, in certain financial institutions that had deposits in excess of current federally insured levels. The Company limits its cash investments to financial institutions with high credit standings; therefore, the Company believes it is not exposed to any significant credit risk on its cash deposits. To date, the Company has experienced no loss or lack of access to cash in its accounts. As of March 31, 2019 , the Company owned real estate investments in 42 metropolitan statistical areas, or MSAs, and one micropolitan statistical area, one of which accounted for 10.0% or more of revenue. Real estate investments located in the Atlanta-Sandy Springs-Roswell, Georgia MSA accounted for 15.6% of revenue for the three months ended March 31, 2019 . As of March 31, 2019 , the Company had no exposure to tenant concentration that accounted for 10.0% or more of revenue for the three months ended March 31, 2019 . Share Repurchase Program The Company’s share repurchase program allows for repurchases of shares of the Company’s common stock when certain criteria are met. The share repurchase program provides that all repurchases during any calendar year, including those redeemable upon death or a Qualifying Disability of a stockholder, are limited to those that can be funded with equivalent proceeds raised from the distribution reinvestment plan, or the DRIP Offering, during the prior calendar year and other operating funds, if any, as the board of directors, in its sole discretion, may reserve for this purpose. Repurchases of shares of the Company’s common stock are at the sole discretion of the Company’s board of directors, provided, however, that the Company will limit the number of shares repurchased during any calendar year to 5.0% of the number of shares of common stock outstanding as of December 31 st of the previous calendar year. In addition, the Company’s board of directors, in its sole discretion, may suspend (in whole or in part) the share repurchase program at any time, and may amend, reduce, terminate or otherwise change the share repurchase program upon 30 days' prior notice to the Company’s stockholders for any reason it deems appropriate. During the three months ended March 31, 2019 , the Company repurchased 1,160,279 Class A shares, Class I shares and Class T shares of common stock ( 858,080 Class A shares, 108,765 Class I shares and 193,434 Class T shares) for an aggregate purchase price of approximately $10,733,000 (an average of $9.25 per share). During the three months ended March 31, 2018 , the Company repurchased 917,212 Class A shares and Class T shares of common stock ( 842,952 Class A shares and 74,260 Class T shares) for an aggregate purchase price of approximately $8,420,000 (an average of $9.18 per share). In connection with the Merger Agreement (as defined in Note 15—"Subsequent Events" ), on April 10, 2019, the Company's board of directors approved the sixth amended and restated share repurchase program. See Note 15—"Subsequent Events" for additional information. Distribution Policy and Distributions Payable In order to maintain its status as a REIT, the Company is required to make distributions each taxable year equal to at least 90% of its REIT taxable income, computed without regard to the dividends paid deduction and excluding capital gains. To the extent funds are available, the Company intends to continue to pay regular distributions to stockholders. Distributions are paid to stockholders of record as of the applicable record dates. Distributions are payable to stockholders from legally available funds therefor. The Company declared distributions per share of common stock in the amounts of $0.16 and $0.15 for the three months ended March 31, 2019 and 2018 , respectively. See Note 15—"Subsequent Events" for information regarding distributions subsequent to March 31, 2019 . Earnings Per Share The Company calculates basic earnings per share by dividing net income attributable to common stockholders for the period by the weighted average shares of its common stock outstanding for that period. Diluted earnings per share are computed based on the weighted average number of shares outstanding and all potentially dilutive securities. Shares of non-vested restricted common stock give rise to potentially dilutive shares of common stock. For the three months ended March 31, 2019 and 2018 , diluted earnings per share reflected the effect of approximately 26,000 and 18,000 shares, respectively, of non-vested shares of restricted common stock that were outstanding as of such period. Reportable Segments ASC 280, Segment Reporting , establishes standards for reporting financial and descriptive information about an enterprise’s reportable segments. As of March 31, 2019 and December 31, 2018 , the Company operated through two reportable segments— real estate investments in data centers and healthcare. With the continued expansion of the Company’s portfolio, segregation of the Company’s operations into two reporting segments is useful in assessing the performance of the Company’s business in the same way that management reviews performance and makes operating decisions. See Note 10—"Segment Reporting" for further discussion on the reportable segments of the Company. Derivative Instruments and Hedging Activities As required by ASC 815, Derivatives and Hedging , or ASC 815, the Company records all derivative instruments as assets and liabilities in the statement of financial position at fair value. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. For those derivative instruments that are designated and qualify as hedging instruments, a company must designate the hedging instrument, based upon the exposure being hedged, as a fair value hedge, cash flow hedge or a hedge of a net investment in a foreign operation. For derivative instruments not designated as hedging instruments, the income or loss is recognized in the condensed consolidated statements of comprehensive income during the current period. The Company is exposed to variability in expected future cash flows that are attributable to interest rate changes in the normal course of business. The Company’s primary strategy in entering into derivative contracts is to add stability to future cash flows by managing its exposure to interest rate movements. The Company utilizes derivative instruments, including interest rate swaps, to effectively convert some its variable rate debt to fixed rate debt. The Company does not enter into derivative instruments for speculative purposes. In accordance with ASC 815, the Company designates interest rate swap contracts as cash flow hedges of floating-rate borrowings. For derivative instruments that are designated and qualify as cash flow hedges, the gain or loss on the derivative instrument is reported as a component of other comprehensive income in the condensed consolidated statements of comprehensive income and reclassified into earnings in the same line item associated with the forecasted transaction and the same period during which the hedged transaction affects earnings. See additional discussion in Note 12—"Derivative Instruments and Hedging Activities." The Company reflects all derivative instruments at fair value as either assets or liabilities on the condensed consolidated balance sheets . In accordance with the fair value measurement guidance Accounting Standards Update, or ASU, 2011-04, Fair Value Measurement , the Company made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio. Recently Adopted Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board, or FASB established ASC 842, by issuing ASU 2016-02, Leases , which replaces the guidance previously outlined in ASC Topic 840, Leases . The new standard increases transparency by requiring the recognition by lessees of right-of-use, or ROU, assets and operating lease liabilities on the balance sheet for all leases with a term of greater than 12 months, regardless of lease classification. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted ASC 842, effective January 1, 2019, using the modified retrospective approach. Consequently, financial information will not be updated, and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. Further, the Company is amortizing the ROU assets and operating lease liabilities over the remaining lease term and is presenting the amortization of ROU assets - operating leases and accretion of operating lease liabilities as a single line item within operating activities in the condensed consolidated statement of cash flow for the three months ended March 31, 2019. The Company elected the package of practical expedients, which permits it to not reassess (1) whether any expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, and (3) any initial direct costs for any existing leases as of the effective date. The Company did not elect the hindsight practical expedient, which permits entities to use hindsight in determining the lease term and assessing impairment. Lessor As a lessor, the Company's recognition of rental revenue remained largely unchanged, apart from the narrower definition of initial direct costs that can be capitalized. Effective January 1, 2019, indirect leasing costs, such as legal costs related to lease negotiations will no longer meet the definition of capitalized initial direct costs under ASU 2016-02 and will be recorded in general and administrative expenses in the condensed consolidated statements of comprehensive income , and will no longer be capitalized. In July 2018, the FASB issued ASU 2018-11, Targeted Improvements , to simplify the guidance, that allows lessors to combine non-lease components with the related lease components if both the timing and pattern of transfer are the same for the non-lease component and related lease component, and the lease component would be classified as an operating lease. The single combined component is accounted for under ASC 842 if the lease component is the predominant component and is accounted for under ASC 606, if the non-lease components are the predominant components. Lessors are permitted to apply the practical expedient to all existing leases on a retrospective or prospective basis. The Company elected the practical expedient to combine its lease and non-lease components that meet the defined criteria and is accounting for the combined lease component under ASC 842. As a result, the Company is no longer presenting rental revenue and tenant reimbursements related to common area maintenance and other expense recoveries separately in the condensed consolidated statements of comprehensive income . In December 2018, the FASB issued ASU 2018-20, Narrow-Scope Improvements for Lessors , that allows lessors to make an accounting policy election not to evaluate whether real estate taxes and other similar taxes imposed by a governmental authority on a specific lease revenue-producing transaction are the primary obligation of the lessor as owner of the underlying leased asset. A lessor that makes this election will exclude these taxes from the measurement of lease revenue and the associated expense. ASU 2018-20 also requires lessors to (1) exclude lessor costs paid directly by lessees to third parties on the lessor’s behalf from variable payments and therefore variable lease revenue and (2) include lessor costs that are paid by the lessor and reimbursed by the lessee in the measurement of variable lease revenue and the associated expense. The Company adopted ASU 2018-20 effective January 1, 2019. The adoption of this standard resulted in a decrease of approximately $406,000 in rental revenue and rental expense, as the aforementioned real estate tax payments are paid by a lessee directly to a third party, and, therefore, are no longer presented on a gross basis in the Company's condensed consolidated statements of comprehensive income . The adoption of this standard had no impact on the Company's net income attributable to common stockholders. Lessee The Company is a lessee on six ground leases, for which three do not have corresponding operating lease liabilities because the Company did not have future payment obligations at the acquisition of these leases. The Company recognized a ROU asset and operating lease liability on the Company's condensed consolidated balance sheet due to the adoption of ASU 2016-02. See Note 5 —"Leases" for further discussion. Derivatives and Hedging In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities , or ASU 2017-12. The objectives of ASU 2017-12 are to (i) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (ii) reduce the complexity of and simplify the application of hedge accounting by preparers. The Company adopted this standard on January 1, 2019. The adoption of ASU 2017-12 resulted in an immaterial cumulative adjustment to accumulated other comprehensive income related to the cumulative ineffectiveness previously recognized on existing cash flow hedges on the Company's condensed consolidated financial statements. In October 2018, the FASB issued ASU 2018-16, Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes , or ASU 2018-16. ASU 2018-16 permits the use of the OIS rate based on SOFR as a United States benchmark interest rate for hedge accounting purposes under Topic 815. ASU 2018-16 was effective upon adoption of ASU 2017-12. The Company adopted ASU 2018-16 on January 1, 2019, and its provisions did not have an impact on its condensed consolidated financial statements. Disclosure Update and Simplification In August 2018, the SEC issued a final rule, SEC Final Rule Release No. 33-10532, Disclosure Update and Simplification , that amends the interim financial statement requirements to require a reconciliation of changes in stockholders' equity in the notes or as a separate statement. This analysis should reconcile the beginning balance to the ending balance of each caption in stockholders' equity for each period for which an income statement is required to be filed and comply with the remaining content requirements of Rule 3-04 of Regulation S-X. Registrants will have to provide the reconciliation for both the year-to-date and quarterly periods and comparable periods in Form 10-Q, but only for the year-to-date periods in registration statements. The final rule became effective on November 5, 2018. As a result, the Company applied these changes in the presentation of the Company's condensed consolidated statement of stockholders' equity for the three months ended March 31, 2019 and 2018. Recently Issued Accounting Pronouncements Not Yet Adopted Fair Value Measurement In August 2018, the FASB issued ASU 2018-13 , Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement , or ASU 2018-13. ASU 2018-13 removes certain disclosure requirements, including the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between the levels and the valuation processes for Level 3 fair value measurements. ASU 2018-13 also adds certain disclosure requirements, including the requirement to disclose the 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 the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, and interim periods therein. Early adoption is permitted. The Company is in the process of evaluating the impact that ASU 2018-13 will have on the Company's condensed consolidated financial statements. Reclassifications Certain prior period amounts have been reclassified to conform to the current financial statement presentation, primarily related to the recently adopted accounting pronouncements discussed within this note. Amounts previously disclosed as rental and parking revenue and tenant reimbursements during the three months ended March 31, 2018, are now included in rental revenue and will no longer be presented separately on the condensed consolidated statements of comprehensive income. |