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Executive Benefit Agreement, Employee Savings Plans and Collective Bargaining Agreements - Life Insurance Premiums (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Compensation Related Costs [Abstract] |  |  |
Cost of life insurance premiums | $ 215 | $ 215 | $ 54
Decreases (increases) in cash surrender values | (69) | (70) | 149
Net cost of life insurance premiums included in SG&A | $ 146 | $ 145 | $ 203

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- Definition Gross cost of life insurance premiums included in SG&A during the reporting period. + References No definition available. + Details
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- Definition Net cost of life insurance premiums included in SG&A during the reporting period. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 30 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6384439&loc=d3e42048-111605 + Details
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