Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The condensed consolidated financial statements include the financial position and results of operations of the Company and its consolidated subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of normal recurring accruals, which are necessary for the fair presentation of the financial condition and results of operations for the interim periods presented. The accompanying condensed consolidated financial statements were prepared in accordance with the requirements for interim financial information. Accordingly, these interim financial statements have not been audited and exclude certain disclosures required for annual financial statements. Also, the operating results presented for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the entire year. These interim financial statements should be read in conjunction with the audited consolidated financial statements of the Company included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed. Such estimates are based on management’s historical experience and best judgment after considering past, current and expected events and economic conditions. Actual results could differ from management’s estimates.
Significant Accounting Policies	Significant Accounting Policies The accompanying condensed consolidated financial statements were prepared on the basis of the accounting principles described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016.
Recent Accounting Pronouncements	Recent Accounting Pronouncements On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued a new standard that provides a single, comprehensive model for recognizing revenue from contracts with customers. The new standard requires additional disclosures about the Company's revenue recognition and could change the way the Company recognizes revenue from construction and development contracts with third party customers. Management is currently reviewing the Company's existing construction contracts to assess the potential impacts of the new standard. A substantial portion of the Company's revenue consists of rental revenues from leasing arrangements, such as base rent, which is specifically excluded from the revenue guidance. Non-lease components, such as tenant reimbursements for common area maintenance, will be subject to the revenue guidance. The Company does not expect the new standard to have a material impact on the measure and recognition of gains and losses on the sale of properties. The new standard will be effective for the Company on January 1, 2018. The Company plans to adopt the new standard using the full retrospective method. On February 25, 2016, the FASB issued a new lease standard that requires lessees to recognize most leases in their balance sheets as lease liabilities with corresponding right-of-use assets. The new standard also makes targeted changes to lessor accounting. The new standard will be effective for the Company on January 1, 2019 and requires a modified retrospective transition approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented, with an option to use certain transition relief. Management is currently evaluating the potential impact of the new standard on the Company’s consolidated financial statements. On March 30, 2016, the FASB issued new guidance that changed the accounting for certain aspects of share-based payments to employees. Entities are required to recognize the income tax effects of awards in the income statement when the awards vest or are settled, and the Company is allowed to account for forfeitures as they occur. The Company adopted the guidance on January 1, 2017 and it did not have a material impact on the Company’s consolidated financial statements. On August 26, 2016, the FASB issued new guidance that addresses eight classification issues related to the statement of cash flows. Early adoption is permitted, including adoption in an interim period. This guidance should be applied retrospectively to each period presented. This new guidance will be effective for the Company on January 1, 2018. Management is currently evaluating the potential impact of the new guidance on the Company’s consolidated financial statements. On February 22, 2017, the FASB issued new guidance that clarifies the scope and application of guidance on sales or transfers of nonfinancial assets and in substance nonfinancial assets to customers, including partial sales. The new guidance applies to all nonfinancial assets, including real estate, and defines an in substance nonfinancial asset. The new guidance will be effective for the Company on January 1, 2018, with early adoption permitted. Management is currently evaluating the potential impact of the new standard on the Company’s consolidated financial statements. On August 28, 2017, the FASB issued new guidance that simplifies some of the requirements relating to accounting for derivatives and hedging. The new guidance eliminates the requirement to separately measure and report hedge ineffectiveness for a highly effective hedge and also simplifies certain documentation and assessment requirements relating to the determination of hedge effectiveness. The new guidance will be effective for the Company on January 1, 2019, with early adoption permitted. The Company does not currently have any derivatives designated as hedging instruments for accounting purposes. The application of this guidance to future hedging relationships could reduce or eliminate the gains and losses that would otherwise be recorded for these derivative instruments.
Segments	Net operating income (segment revenues minus segment expenses) is the measure used by the Company’s chief operating decision-maker to assess segment performance. Net operating income is not a measure of operating income or cash flows from operating activities as measured by GAAP and is not indicative of cash available to fund cash needs. As a result, net operating income should not be considered an alternative to cash flows as a measure of liquidity. Not all companies calculate net operating income in the same manner. The Company considers net operating income to be an appropriate supplemental measure to net income because it assists both investors and management in understanding the core operations of the Company’s real estate and construction businesses.
Derivative Financial Instruments	Derivative Financial Instruments The Company may enter into interest rate derivative contracts to manage exposure to interest rate risks. The Company does not use derivative financial instruments for trading or speculative purposes. Derivative financial instruments are recognized at fair value and presented within other assets and liabilities in the condensed consolidated balance sheets. Gains and losses resulting from changes in the fair value of derivatives that are neither designated nor qualify as hedging instruments are recognized within the change in fair value of interest rate derivatives in the condensed consolidated statements of income. For derivatives that qualify as cash flow hedges, the effective portion of the gain or loss is reported as a component of other comprehensive loss and reclassified into earnings in the periods during which the hedged forecasted transaction affects earnings.
Fair Value of Financial Instruments	Fair value measurements are based on assumptions that market participants would use in pricing an asset or a liability. The hierarchy for inputs used in measuring fair value is as follows: Level 1—quoted prices in active markets for identical assets or liabilities Level 2—observable inputs other than quoted prices in active markets for identical assets and liabilities Level 3—unobservable inputs Except as disclosed below, the carrying amounts of the Company’s financial instruments approximate their fair value. Financial assets and liabilities whose fair values are measured on a recurring basis using Level 2 inputs consist of interest rate swaps and caps. The Company measures the fair values of these assets and liabilities based on prices provided by independent market participants that are based on observable inputs using market-based valuation techniques. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. For disclosure purposes, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement. The fair value of the Company’s long term debt is sensitive to fluctuations in interest rates. Discounted cash flow analysis based on Level 2 inputs is generally used to estimate the fair value of the Company’s long term debt. Considerable judgment is used to estimate the fair value of financial instruments. The estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized upon disposition of the financial instruments.
Legal Proceedings	Legal Proceedings The Company is from time to time involved in various disputes, lawsuits, warranty claims, environmental and other matters arising in the ordinary course of business. Management makes assumptions and estimates concerning the likelihood and amount of any potential loss relating to these matters. The Company currently is a party to various legal proceedings. Management accrues a liability for litigation if an unfavorable outcome is determined to be probable and the amount of loss can be reasonably estimated. If an unfavorable outcome is determined to be probable and a range of loss can be reasonably estimated, management accrues the best estimate within the range; however, if no amount within the range is a better estimate than any other, the minimum amount within the range is accrued. Legal fees related to litigation are expensed as incurred. Management does not believe that the ultimate outcome of these matters, either individually or in the aggregate, could have a material adverse effect on the Company’s financial position or results of operations; however, litigation is subject to inherent uncertainties. Under the Company’s leases, tenants are typically obligated to indemnify the Company from and against all liabilities, costs and expenses imposed upon or asserted against it as owner of the properties due to certain matters relating to the operation of the properties by the tenant.