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Benefit Plans - Change in Net Actuarial Loss (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Benefit Plans |  |  |
Percentage of greater of projected benefit obligation or fair value of plan assets for amortization of actuarial gains or losses | 5.00% |  |
Amortization period for actuarial gains and losses that exceed threshold | 5 years |  |
Pension Plan |  |  |
Change in net actuarial loss and amortization |  |  |
Net actuarial loss (gain) at beginning of year | $ 44,351 |  |
Amortization cost | (6,961) | $ (5,806) | $ (6,995)
Liability loss (gain) | (4,614) | 14,935 | 21,512
Asset (gain) loss | 3,581 | (4,839) | (16,278)
Net actuarial loss (gain) at end of year | 36,357 | 44,351 |
Pension Benefits |  |  |
Change in net actuarial loss and amortization |  |  |
Net actuarial loss (gain) at beginning of year | 44,351 | 40,061 |
Amortization cost | (6,961) | (5,806) |
Liability loss (gain) | (4,614) | 14,935 |
Asset (gain) loss | 3,581 | (4,839) |
Net actuarial loss (gain) at end of year | 36,357 | 44,351 | 40,061
Other Benefits |  |  |
Change in net actuarial loss and amortization |  |  |
Net actuarial loss (gain) at beginning of year | (1,068) | (1,582) |
Amortization cost | 48 | 211 | 385
Liability loss (gain) | (2,074) | 303 | 540
Net actuarial loss (gain) at end of year | $ (3,094) | $ (1,068) | $ (1,582)

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- Definition Amortization period of amount included in accumulated other comprehensive income (AOCI) related to actuarial gain (loss) when such gains or losses exceed a percentage threshold. + References No definition available. + Details
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- Definition The threshold for amortization of amount included in accumulated other comprehensive income (AOCI) related to actuarial gain (loss) as a percentage of the greater of the projected benefit obligation or the fair value of plan assets. + References No definition available. + Details
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- Definition Amount before tax of increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. + References No definition available. + Details
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- Definition Amount before tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption that has not been recognized in net periodic benefit (cost) credit. + References No definition available. + Details
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 + Details
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