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. The accompanying condensed consolidated unaudited financial statements of the Company have been prepared in accordance with the accounting principles generally accepted in the United States, 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 normal and recurring nature considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2016 are not necessarily indicative of the results that may be expected for the year ended December 31, 2016 . The condensed consolidated balance sheet at December 31, 2015 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, 2015 and related notes thereto set forth in the Company’s Annual Report on Form 10-K, filed with the SEC on March 28, 2016. Principles of Consolidation and Basis of Presentation The accompanying condensed consolidated financial statements include the accounts of the Company, the Operating Partnership, all majority-owned subsidiaries and controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. On January 1, 2016, the Company adopted Accounting Standards Update, or ASU, ASU 2015-02, Amendments to the Consolidation Analysis, which amends the current consolidation guidance affecting both the variable interest entity (VIE) and voting interest entity (VOE) consolidation models. The standard does not add or remove any of the characteristics in determining if an entity is a VIE or VOE, but rather enhances the way the Company assesses some of these characteristics. The Company concluded that no change was required to its accounting for its joint venture. However, the Operating Partnership now meets the criteria as a VIE, the Company is the primary beneficiary and, accordingly, the Company continues to consolidate the Operating Partnership. The Company’s sole asset is its investment in the Operating Partnership, and consequently, all of the Company’s assets and liabilities represent those assets and liabilities of the Operating Partnership. All of the Company’s debt is an obligation of the Operating Partnership. Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP necessarily requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. 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. Concentration of Credit Risk and Significant Leases As of March 31, 2016 , the Company had cash on deposit, including restricted cash, in certain financial institutions that had deposits in excess of current federally insured levels; however, the Company has not experienced any losses in such accounts. 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 of or lack of access to cash in its accounts. Concentration of credit risk with respect to accounts receivable from tenants is limited. As of March 31, 2016 , the Company owned real estate investments in 44 MSAs, (including one real estate investment owned through a consolidated partnership), three of which accounted for 10.0% or more of rental revenue. Real estate investments located in the Dallas-Ft. Worth-Arlington, Texas MSA, the Chicago-Naperville-Elgin, Illinois-Indiana-Wisconsin MSA and the Houston-The Woodlands-Sugar Land, Texas MSA accounted for an aggregate of 13.1% , 11.6% and 10.1% , respectively, of rental revenue for the three months ended March 31, 2016 . As of March 31, 2016 , the Company had two tenants that accounted for 10.0% or more of rental revenue. The leases with AT&T Services, Inc. and the lease with Bay Area Regional Medical Center, LLC accounted for 12.7% and 10.0% , respectively, of rental revenue for the three months ended March 31, 2016 . Deferred Financing Costs Deferred financing costs are loan fees, legal fees and other third-party costs associated with obtaining financing. These costs are amortized over the terms of the respective financing agreements using the effective interest method. Unamortized deferred financing costs are generally expensed when the associated debt is refinanced or repaid before maturity unless specific rules are met that would allow for the carryover of such costs to the refinanced debt. Costs incurred in seeking financing transactions that do not close are expensed in the period in which it is determined that the financing will not close. On January 1, 2016, the Company adopted ASU 2015-03, Interest — Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, and ASU 2015-15 , Interest—Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated With Line-of-Credit Arrangements, or ASUs 2015-03 and 2015-15. According to ASUs 2015-03 and 2015-15, deferred financing costs related to a recognized debt liability in connection with term loans, including the term loan portion of the Company's credit facility, are presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. Deferred financing costs related to the revolving line of credit portion of the Company's unsecured credit facility are presented in the balance sheet as an asset, which is included in other assets on the condensed consolidated balance sheet. As required, the Company retrospectively applied the guidance in ASUs 2015-03 and 2015-15 to the prior period presented, which resulted in a decrease of $6,805,000 in other assets, $4,261,000 in notes payable and $2,544,000 in credit facility on the condensed consolidated balance sheet as of December 31, 2015. 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 reinvestments pursuant to the DRIP Offerings 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. In addition, the Company’s board of directors, in its sole discretion, may amend, suspend, 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. The share repurchase program provides 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 31st of the previous calendar year. During the three months ended March 31, 2016 , the Company received valid repurchase requests related to approximately 871,000 shares of common stock, all of which were repurchased in full for an aggregate purchase price of approximately $8,393,000 (an average of $9.64 per share). During the three months ended March 31, 2015 , the Company received valid repurchase requests related to approximately 133,000 shares of common stock, all of which were repurchased in full for an aggregate purchase price of approximately $1,287,000 (an average of $9.68 per share). Earnings Per Share Basic earnings per share attributable for all periods presented are computed by dividing net income attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Shares of non-vested restricted common stock give rise to potentially dilutive shares of common stock. Diluted earnings per share are computed based on the weighted average number of shares outstanding and all potentially dilutive securities. For the three months ended March 31, 2016 and 2015 , diluted earnings per share reflected the effect of approximately 17,000 and 17,000 , respectively, of non-vested shares of restricted common stock that were outstanding as of such period. Recently Issued Accounting Pronouncements On May 28, 2014, the Financial Accounting Standards Board, or the FASB, issued ASU 2014-09, Revenue from Contracts with Customers , or ASU 2014-09. The objective of ASU 2014-09 is to clarify the principles for recognizing revenue and to develop a common revenue standard for GAAP. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods and 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. ASU 2014-09 defines a five-step process to achieve this core principle, which may require more judgment and estimates within the revenue recognition process than are required under existing GAAP. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606) Deferral of the Effective Date , or ASU 2015-14. ASU 2015-14 defers the effective date of ASU 2014-09 by one year to fiscal years and interim periods beginning after December 15, 2017. Early adoption is permitted as of the original effective date, which was annual reporting periods beginning after December 15, 2016, and the interim periods within that year. On March 17, 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers Principal versus Agent Considerations (Reporting Revenue Gross versus Net), or ASU 2016-08, which clarifies the implementation guidance on principal versus agent considerations in the new revenue recognition standard. ASU 2016-08 clarifies that an entity is a principal when it controls the specified good or service before that good or service is transferred to the customer, and is an agent when it does not control the specified good or service before it is transferred to the customer. The effective date and transition of these amendments is the same as the effective date and transition of ASU 2015-14. The Company is in the process of evaluating the impact ASU 2016-08 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, with no effect on the Company’s condensed consolidated financial position or results of operations. |