Summary Of Significant Accounting Policies | 2. Summary of significant accounting policies Basis of presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for the year ended December 31, 2016. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . Consolidation and Equity Method of Accounting The Company accounts for its investment in a joint venture that it has significant influence over, but does not control, using the equity method of accounting eliminating intra-entity profits and losses as if the joint venture were a consolidated subsidiary. The accompanying consolidated financial statements include the accounts of PSB and the Operating Partnership. All significant inter-company balances and transactions have been eliminated in the consolidated financial statements. The Company consolidates all variable interest entities (each a “VIE”) for which it is the primary beneficiary. Generally, a VIE is a legal entity in which the equity investors do not have the characteristics of a controlling financial interest or the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support. A limited partnership may be considered a VIE if the limited partners do not participate in operating decisions. Under this criteria, the Operating Partnership is considered a VIE. The Company’s significant asset is its investment in the Operating Partnership, and consequently, substantially 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. Noncontrolling interests The Company’s noncontrolling interests are reported as a component of equity separate from the parent’s equity. Purchases or sales of equity interests that do not result in a change in control are accounted for as equity transactions. In addition, net income attributable to the noncontrolling interests is included in consolidated net income on the face of the income statement and, upon a gain or loss of control, the interests purchased or sold, as well as any interests retained, are recorded at fair value with any gain or loss recognized in earnings. At the end of each reporting period, the Company determines the amount of equity (book value of net assets) which is allocable to the noncontrolling interests based upon the ownership interest, and an adjustment is made to the noncontrolling interests, with a corresponding adjustment to paid-in capital, to reflect the noncontrolling interests’ equity interest in the Company. Use of estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates. Allowance for doubtful accounts The Company monitors the collectability of its receivable balances including the deferred rent receivable on an ongoing basis. Based on these reviews, the Company maintains an allowance for doubtful accounts for estimated losses resulting from the possible inability of tenants to make contractual rent payments to the Company. A provision for doubtful accounts is recorded during each period. The allowance for doubtful accounts is netted against tenant and other receivables on the consolidated balance sheets. Tenant receivables are net of an allowance for uncollectible accounts totaling $ 400,000 at September 30, 2016 and December 31, 2015 . Deferred rent receivable is net of an allowance for uncollectible accounts totaling $ 919,000 and $ 909,000 at September 30, 2016 and December 31, 2015 , respectively. Financial instruments The methods and assumptions used to estimate the fair value of financial instruments are described below. The Company has estimated the fair value of financial instruments using available market information and appropriate valuation methodologies. Considerable judgment is required in interpreting market data to develop estimates of market value. Accordingly, estimated fair values are not necessarily indicative of the amounts that could be realized in current market exchanges. The Company determines the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy: * Level 1 —quoted prices for identical instruments in active markets; * 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 —fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Financial assets that are exposed to credit risk consist primarily of cash and cash equivalents and receivables. The Company considers all highly liquid investments with a remaining maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents, which consist primarily of money market investments, are only invested in entities with an investment grade rating. Receivables are comprised of balances due from a large number of customers. Balances that the Company expects to become uncollectible are reserved for or written off. Due to the short period to maturity of the Company’s cash and cash equivalents, accounts receivable, other assets and accrued and other liabilities, the carrying values as presented on the consolidated balance sheets are reasonable estimates of fair value. Carrying values of the Company’s mortgage note payable and unsecured credit facility approximate fair value. The characteristics of these financial instruments, market data and other comparative metrics utilized in determining these fair values are “Level 2” inputs. Real estate facilities Real estate facilities are recorded at cost. Costs related to the renovation or improvement of the properties are capitalized. Expenditures for repairs and maintenance are expensed as incurred. Expenditures that are expected to benefit a period greater than two years and exceed $2,000 are capitalized and depreciated over their estimated useful life. Buildings and improvements are depreciated using the straight-line method over their estimated useful lives, which generally range from five to 30 years. Transaction costs, which include tenant improvements and lease commissions, of $1,000 or more for leases with terms greater than one year are capitalized and depreciated over their estimated useful lives. Transaction costs less than $1,000 or for leases of one year or less are expensed as incurred. Land held for future development Property taxes, insurance, interest and costs essential to the development of property for its intended use are capitalized during the period of development. Upon classification of an asset as held for development, depreciation of the asset is ceased. Properties held for disposition An asset is classified as an asset held for disposition when it meets certain requirements, which include, among other criteria, the approval of the sale of the asset, the marketing of the asset for sale and the expectation by the Company that the sale will likely occur within the next 12 months. Upon classification of an asset as held for disposition, depreciation of the asset is ceased, and the net book value of the asset is included on the balance sheet as properties held for disposition. Intangible assets/liabilities Intangible assets and liabilities include above-market and below-market in-place lease values of acquired properties based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease. The capitalized above-market and below-market lease values (included in other assets and accrued liabilities in the accompanying consolidated balance sheets) are amortized to rental income over the remaining non-cancelable terms of the respective leases. As of September 30, 2016 , the value of in-place leases resulted in net intangible assets of $ 1.2 million, net of $ 9.0 million of accumulated amortization with a weighted average amortization period of 9.2 years, and net intangible liabilities of $ 990,000 , net of $ 9.8 million of a ccumulated amortization with a weighted average amortization period of 6.3 years. As of December 31, 2015 , the value of in-place leases resulted in net intangible assets of $ 1.7 million, net of $ 8.6 million of accumulated amortization and net intangible liabilities of $ 1.8 million, net of $ 9.0 million of accumulated amortization. The Company recorded net increases in rental income of $106,000 and $341,000 for the three months ended September 30, 2016 and 2015 , respectively, and $437,000 and $1.0 million for the nine months ended September 30, 2016 and 2015 , respectively, due to the amortization of net intangible liabilities resulting from the above-market and below-market lease values. Evaluation of asset impairment The Company evaluates its assets used in operations for impairment by identifying indicators of impairment and by comparing the sum of the estimated undiscounted future cash flows for each asset to the asset’s carrying value. When indicators of impairment are present and the sum of the estimated undiscounted future cash flows is less than the carrying value of such asset, an impairment loss is recorded equal to the difference between the asset’s current carrying value and its value based on discounting its estimated future cash flows. In addition, the Company evaluates its assets held for disposition for impairment. Assets held for disposition are reported at the lower of their carrying value or fair value, less cost of disposition. At September 30, 2016 , the Company did not consider any assets to be impaired. Stock compensation All share-based payments to employees, including grants of employee stock options, are recognized as stock compensation in the Company’s income statement based on their grant date fair values. See Note 12. Revenue and expense recognition The Company must meet four basic criteria before revenue can be recognized: persuasive evidence of an arrangement exists; the delivery has occurred or services have been rendered; the fee is fixed or determinable; and collectability is reasonably assured. All leases are classified as operating leases. Rental income is recognized on a straight-line basis over the terms of the leases. Straight-line rent is recognized for all tenants with contractual fixed increases in rent that are not included on the Company’s credit watch list. Deferred rent receivable represents rental revenue recognized on a straight-line basis in excess of billed rents. Reimbursements from tenants for real estate taxes and other recoverable operating expenses are recognized as rental income in the period the applicable costs are incurred. Property management fees are recognized in the period earned. Costs incurred in connection with leasing (primarily tenant improvements and lease commissions) are capitalized and amortized over the lease period. Gains from sales of real estate facilities The Company recognizes gains from sales of real estate facilities at the time of sale using the full accrual method, provided that various criteria related to the terms of the transactions and any subsequent involvement by the Company with the properties sold are met. If the criteria are not met, the Company defers the gains and recognizes them when the criteria are met or uses the installment or cost recovery methods as appropriate under the circumstances. General and administrative expenses General and administrative expenses include executive and other compensation, office expenses, professional fees, acquisition transaction costs, state income taxes and other such administrative items. Income taxes The Company has qualified and intends to continue to qualify as a REIT, as defined in Section 856 of the Internal Revenue Code of 1986, as amended. As a REIT, the Company is not subject to federal income tax to the extent that it distributes its REIT taxable income to its shareholders. A REIT must distribute at least 90% of its taxable income each year. In addition, REITs are subject to a number of organizational and operating requirements. The Company may be subject to certain state and local taxes on its income and property and to federal income and excise taxes on its undistributed taxable income. The Company believes it met all organization and operating requirements to maintain its REIT status during 2015 and intends to continue to meet such requirements for 2016 . Accordingly, no provision for income taxes has been made in the accompanying consolidated financial statements. The Company can recognize a tax benefit only if it is “more likely than not” that a particular tax position will be sustained upon examination or audit. To the extent that the “more likely than not” standard has been satisfied, the benefit associated with a position is measured as the largest amount that is greater than 50% likely of being recognized upon settlement. As of September 30, 2016 , the Company did not recognize any tax benefit for uncertain tax positions. Accounting for preferred equity issuance costs The Company records issuance costs as a reduction to paid-in capital on its balance sheet at the time the preferred securities are issued and reflects the carrying value of the preferred equity at the stated value. Such issuance costs are recorded as non-cash preferred equity distributions at the time the Company notifies the holders of preferred stock of its intent to redeem such shares. Net income allocation Net income was allocated as follows (in thousands) : For The Three Months For The Nine Months Ended September 30, Ended September 30, 2016 2015 2016 2015 Net income allocable to noncontrolling interests: Noncontrolling interests—common units $ 5,315 $ 6,087 $ 13,495 $ 14,467 Total net income allocable to noncontrolling interests 5,315 6,087 13,495 14,467 Net income allocable to PS Business Parks, Inc.: Preferred shareholders Distributions to preferred shareholders 13,833 15,122 41,498 45,366 Non-cash distributions related to the redemption of preferred stock — 2,487 — 2,487 Total net income allocable to preferred shareholders 13,833 17,609 41,498 47,853 Restricted stock unit holders 128 97 387 237 Common shareholders 19,718 22,484 50,017 53,384 Total net income allocable to PS Business Parks, Inc. 33,679 40,190 91,902 101,474 Net income $ 38,994 $ 46,277 $ 105,397 $ 115,941 Net income per common share Per share amounts are computed using the number of weighted average common shares outstanding. “Diluted” weighted average common shares outstanding includes the dilutive effect of stock options and restricted stock units under the treasury stock method. “Basic” weighted average common shares outstanding excludes such effect. The Company's restricted stock units are participating securities and are included in the computation of basic and diluted weighted average common shares outstanding. The Company’s restricted stock unit holders are paid non-forfeitable dividends in excess of the expense recorded which results in a reduction in net income allocable to common shareholders and unit holders. Earnings per share has been calculated as follows ( in thousands, except per share amounts ): For The Three Months For The Nine Months Ended September 30, Ended September 30, 2016 2015 2016 2015 Net income allocable to common shareholders $ 19,718 $ 22,484 $ 50,017 $ 53,384 Weighted average common shares outstanding: Basic weighted average common shares outstanding 27,103 26,985 27,076 26,956 Net effect of dilutive stock compensation—based on treasury stock method using average market price 98 64 90 78 Diluted weighted average common shares outstanding 27,201 27,049 27,166 27,034 Net income per common share—Basic $ 0.73 $ 0.83 $ 1.85 $ 1.98 Net income per common share—Diluted $ 0.72 $ 0.83 $ 1.84 $ 1.97 No options were excluded from the computation of diluted net income per share for the three months ended September 30, 2016 as no options were considered anti-dilutive. Options to purchase 25,000 shares were excluded from the computation of diluted net income per share for the nine months ended September 30, 2016 as such options were considered anti-dilutive. Options to purchase 46,000 shares were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2015 as such options were considered anti-dilutive. Segment reporting The Company views its operations as one segment. Reclassifications Certain reclassifications have been made to the consolidated financial statements for 2015 in order to conform to the 2016 presentation. Recently issued accounting standards In May, 2014, the Financial Accounting Standards Board (“ FASB ”) issued Accounting Standard Update (“ASU”) 2014-09, Revenue from Contracts with Customers , which amended the existing accounting standards for revenue recognition. The new accounting guidance establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. This guidance is currently effective for the Company’s fiscal year beginning January 1, 2018. Early adoption is permitted for the Company’s fiscal year beginning January 1, 2017. The amendment allows for full retrospective adoption applied to all periods presented or modified retrospective adoption with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company is currently in the process of evaluating the impact of adoption of the new accounting guidance on its consolidated financial statements. In August, 2014, the FASB issued ASU 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern , which is intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern for a period of one year after the date that the financial statements are issued. This guidance is effective for annual periods ending after December 15, 2016 and interim periods within annual periods beginning after December 15, 2016. Early adoption is permitted. The Company anticipates no impact upon adoption of the new accounting guidance on its consolidated financial statements. In February, 2015, the FASB issued ASU 2015-02, Consolidation – Amendments to the Consolidation Analysis , which amended the existing accounting standards for consolidation under both the variable interest model and the voting model. On January 1, 2016, the Company adopted this guidance and as the Operating Partnership is already consolidated in the balance sheets of the Company, the identification of this entity as a VIE has no impact on the consolidated financial statements of the Company. Additionally, the Company’s accounting for its investment in its joint venture was not impacted by the adoption of this guidance. In February, 2016, the FASB issued ASU 2016-02, Leases, which amends the existing accounting standards for lease accounting. The accounting applied by a lessor is largely unchanged under this guidance. However, the guidance requires lessees to recognize assets and liabilities for most leases on the balance sheet. This guidance is effective for annual periods beginning after December 15, 2018 and interim periods within annual periods beginning after December 15, 2018. Early adoption is permitted. The guidance must be adopted using a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. The Company is currently in the process of evaluating the impact of adoption of the new accounting guidance on its consolidated financial statements. In March, 2016, the FASB issued ASU 2016-09 , Improvements to Employee Share-Based Payment Accounting , to amend the accounting guidance for share-based payment accounting. The guidance is intended to simplify the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. This guidance is effective for annual periods beginning after December 15, 2016 and interim periods within those annual periods and early adoption is permitted. The Company is currently assessing the impact of the guidance on its consolidated financial statements. |