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Interest Rate Swap Agreement (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Interest Rate Swap Agreement [Abstract] |  |  |  |  |
Total long-term debt | $ 129,905 |  | $ 129,905 |  | $ 126,570
Interest Rate Swap [Member] |  |  |  |  |
Interest Rate Swap Agreement [Abstract] |  |  |  |  |
Notional amount of swap | $ 12,000 |  | $ 12,000 |  |
Fixed interest rate | 3.16% |  | 3.16% |  |
Net payment rate on swap | 3.09% | 2.91% | 3.02% | 2.59% |
Interest rate swap settlements reclassified from regulatory assets to interest expense | $ 93 | $ 87 | $ 184 | $ 156 |
Overall interest rate swap (gain) loss | 212 | $ 189 | (219) | $ 901 |
Interest rate swap settlements to be reclassified during the next 12 months | 369 |  | 369 |  |
Potential payment to counterparty | $ 2,368 |  | $ 2,368 |  |
LIBOR [Member] | Interest Rate Swap [Member] |  |  |  |  |
Interest Rate Swap Agreement [Abstract] |  |  |  |  |
Percentage of variable interest rate | 59.00% |  | 59.00% |  |
Term of variable rate |  |  | 1 month |  |
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member] |  |  |  |  |
Interest Rate Swap Agreement [Abstract] |  |  |  |  |
Total long-term debt | $ 12,000 |  | $ 12,000 |  | $ 12,000

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
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- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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- Definition Term of the interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Percentage of variable interest rate paid by the counterparty on the notional amount of the interest rate derivative. + References No definition available. + Details
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- Definition The amount reclassified from regulatory assets to interest expense during the period as a result of interest rate swap settlements. The Company uses regulatory accounting treatment rather than hedge accounting to defer the unrealized gains and losses on its interest rate swap. Instead of the effective portion being recorded as other comprehensive income or loss and the ineffective portion being recognized in earnings using the cash flow hedge accounting rules provided by the derivative accounting standards, the entire unrealized swap value is recorded as a regulatory asset. Based on current ratemaking treatment, the Company expects the unrealized gains and losses to be recognized in rates as a component of interest expense as the swap settlements occur. Swap settlements are recorded in the income statement with the hedged item as interest expense. + References No definition available. + Details
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- Definition The amount of (gains) or losses on an interest rate swap deferred in the period and recorded as a (decrease)/increase in the regulatory asset. + References No definition available. + Details
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- Definition The potential amount payable to the interest rate swap counter party due to certain violations of the terms and conditions of the swap agreement. + References No definition available. + Details
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