Fair Value Measurements	9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	(10) Fair Value Measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. Level 1 means the use of quoted prices in active markets for identical assets or liabilities. Level 2 means the use of values that are derived principally from or corroborated by observable market data. Level 3 means the use of inputs are those that are unobservable and significant to the overall fair value measurement. During the quarter ending September 30, 2018 the Company invested in 78 corporate bonds with individual maturities ranging from 2020 through 2024. The unrealized loss on these bonds of $567,000 was recorded as part of comprehensive income and was based on the estimated market value by National Financial Services, LLC (“NFS”) obtained from sources that may include pricing vendors, broker/dealers who clear through NFS and/or other sources (Level 2). The amortized cost of the investments was $191,853,000 and the carrying amount and fair value of such bonds were $191,288,000 as of September 30, 2018. At September 30, 2018 and 2017, the carrying amount reported in the consolidated balance sheets for cash and cash equivalents and revolving credit approximate their fair value based upon the short-term nature of these items. The fair values of the Company’s other mortgage notes payable were estimated based on current rates available to the Company for debt of the same remaining maturities. At September 30, 2018, the carrying amount and fair value of such other long-term debt was $88,755,000 and $85,642,000, respectively. At December 31, 2017, the carrying amount and fair value of such other long-term debt was $118,317,000 and $122,271,000, respectively.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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