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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | $ 93,932 | $ 84,426
Other comprehensive loss before reclassifications | 0 | (1,060)
Amounts reclassified from accumulated other comprehensive income | (161) | (691)
Income tax benefit | 33 | 383
Ending Balance | 102,103 | 89,452
Derivative Hedging Activities |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | 0 | (191)
Other comprehensive loss before reclassifications | 0 | (1,060)
Amounts reclassified from accumulated other comprehensive income | 0 | (533)
Income tax benefit | 0 | 350
Ending Balance | 0 | (1,434)
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 | (161) | (158)
Income tax benefit | 33 | 33
Ending Balance | 1,247 | 1,436
Accumulated Other Comprehensive Income |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Beginning Balance | 1,375 | 1,370
Ending Balance | $ 1,247 | $ 2

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