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Fair Value Measurements
9 Months Ended
Sep. 30, 2019
Fair Value Measurements [Abstract]  
Fair Value Measurements
7.  Fair Value of Financial Instruments
 
The accounting standards regarding fair value measurements establish a fair value hierarchy which indicates the extent to which inputs used in measuring fair value are observable in the market.  Level 1 inputs include quoted prices for identical instruments and are the most observable.  Level 2 inputs include quoted prices for similar assets and observable inputs such as interest rates, commodity rates and yield curves.  Level 3 inputs are not observable in the market and include management’s own judgments about the assumptions market participants would use in pricing the asset or liability.

The Company has recorded its interest rate swap liability at fair value in accordance with the standards.  The liability is recorded under the caption “Other deferred credits” on the balance sheet.  The table below illustrates the fair value of the interest rate swap as of the end of the reporting period.
 
Description
 
September 30, 2019
 
Fair Value Measurements
at Reporting Date Using
Significant Other Observable Inputs (Level 2)
Interest Rate Swap
 
$2,435
 
$2,435
 
Fair values are measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curve as of the date of the valuation.  These inputs to this calculation are deemed to be Level 2 inputs.  The balance sheet carrying value reflects the Company's credit quality as of September 30, 2019.  The rate used in discounting all prospective cash flows anticipated to be made under this swap reflects a representation of the yield to maturity for 30-year debt on utilities rated A- as of September 30, 2019.  The use of the Company's credit rating resulted in a reduction in the fair value of the swap liability of $165 as of September 30, 2019.  The fair value of the swap reflecting the Company's credit quality as of December 31, 2018 is shown in the table below.
 
Description
 
December 31, 2018
 
Fair Value Measurements
at Reporting Date Using
Significant Other Observable Inputs (Level 2)
Interest Rate Swap
 
$1,815
 
$1,815
 
The carrying amount of current assets and liabilities that are considered financial instruments approximates fair value as of the dates presented.  The Company's total long-term debt, with a carrying value of $103,328 at September 30, 2019, and $95,908 at December 31, 2018, had an estimated fair value of approximately $123,000 and $105,000, respectively.  The estimated fair value of debt was calculated using a discounted cash flow technique that incorporates a market interest yield curve with adjustments for duration and risk profile.  These inputs to this calculation are deemed to be Level 2 inputs.  The Company recognized its credit rating in determining the yield curve, and did not factor in third party credit enhancements including bond insurance on the 2006 York County Industrial Development Authority issue and the letter of credit on the 2008 Pennsylvania Economic Development Financing Authority Series A issue.

Customers' advances for construction and note receivable had carrying values at September 30, 2019 of $7,916 and $255, respectively.  At December 31, 2018, customers' advances for construction and note receivable had carrying values of $6,849 and $255, respectively.  The relative fair values of these amounts cannot be accurately estimated since the timing of future payment streams is dependent upon several factors, including new customer connections, customer consumption levels and future rate increases.