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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | $ 93,932 | $ 84,426
Other comprehensive loss before reclassifications | 0 | (71)
Amounts reclassified from accumulated other comprehensive income | (242) | (1,171)
Income tax benefit | 51 | 273
Ending Balance | 99,292 | 93,529
Derivative Hedging Activities |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | 0 | (191)
Other comprehensive loss before reclassifications | 0 | (71)
Amounts reclassified from accumulated other comprehensive income | 0 | (935)
Income tax benefit | 0 | 223
Ending Balance | 0 | (974)
Post Retirement Benefit Plan Items |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | 1,375 | 1,561
Other comprehensive loss before reclassifications | 0 | 0
Amounts reclassified from accumulated other comprehensive income | (242) | (236)
Income tax benefit | 51 | 50
Ending Balance | 1,184 | 1,375
Accumulated Other Comprehensive Income |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | 1,375 | 1,370
Ending Balance | $ 1,184 | $ 401

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