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Employee Retirement Plans - Reconciliations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Salaried Pension Plan |  |  |
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent | $ 17,170 | $ 15,804 |
Pension cost |  |  |
Component of net periodic cost: |  |  |
Interest cost |  |  | $ 1,642
Expected return on plan assets |  |  | (1,175)
Amortization of net (gain) loss |  |  | 595
Effect of settlement for termination |  |  | 6,380
Net periodic pension cost |  |  | 7,442
Employer contributions during the period |  |  | 460
Change in projected benefit obligation: |  |  |
Benefit obligation at beginning of year |  |  | 40,182
Actuarial (gain) loss |  |  | 166
Benefits paid |  |  | (1,451)
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year |  |  | 38,053
Actual return on plan assets |  |  | 3,477
Benefits paid |  |  | (1,451)
Pension settlement |  |  | (40,539)
Funded status at end of year |  |  |
Salaried Pension Plan |  |  |
Accumulated benefit obligation |  |  | 0
Pension cost | Minimum |  |  |
Component of net periodic cost: |  |  |
Employer contributions during the period |  |  | 0
Other postretirement benefit cost |  |  |
Component of net periodic cost: |  |  |
Service cost | 137 | 147 | 149
Interest cost | 137 | 191 | 252
Amortization of net (gain) loss | (312) | (310) | (312)
Net periodic pension cost | (38) | 28 | 89
Change in projected benefit obligation: |  |  |
Benefit obligation at beginning of year | 6,736 | 6,538 |
Participant contributions | 52 | 55 |
Actuarial (gain) loss | (790) | (178) |
Benefits paid | (11) | (17) |
Benefit obligation at end of year | 6,261 | 6,736 | $ 6,538
Change in plan assets: |  |  |
Benefits paid | $ (11) | (17) |
Period of coverage under the plan | 10 years |  |
Amounts recognized in the consolidated balance sheets consisted |  |  |
Accrued expenses and other current liabilities | $ 230 | 250 |
Amounts recognized in the consolidated balance sheets | $ 6,261 | 6,736 |
Salaried Pension Plan |  |  |
Period of service of employees | 12 years |  |
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent | $ 6,031 | $ 6,486 |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + 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 (e) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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 (b)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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