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Retirement Benefits - Multiemployer Pension Plans (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) plan | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Number of plans | plan |  | 4 |  |
Contributions |  | $ 4,785 | $ 5,292 | $ 6,423
Defined contribution plans contributions charged to expense |  | $ 14,400 | $ 12,000 | 11,800
Central States, Southeast and Southwest Areas Pension Fund |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN/Pension Plan Number | [1] | 36-6044243/001 |  |
Pension Protection Act Zone Status | [2] | Red | Red |
FIP / RP Status Pending / Implemented |  | Implemented |  |
Contributions |  | $ 1,166 | $ 1,797 | 1,873
Surcharge Imposed |  | No |  |
United Food and Commercial Workers Local One Pension Fund |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN/Pension Plan Number | [3] | 16-6144007/001 |  |
Pension Protection Act Zone Status |  | Red | Red |
FIP / RP Status Pending / Implemented |  | Implemented |  |
Contributions |  | $ 245 | $ 237 | 232
Surcharge Imposed |  | No |  |
Expiration Dates of Collective Bargaining Agreements, First |  | Dec. 31, 2020 |  |
IAM National Pension Fund [Member] [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN/Pension Plan Number | [4] | 51-6031295/002 |  |
Pension Protection Act Zone Status |  | Red | Green |
FIP / RP Status Pending / Implemented |  | Implemented |  |
Contributions |  | $ 2,667 | $ 2,587 | 2,722
Surcharge Imposed |  | Yes |  |
Expiration Dates of Collective Bargaining Agreements, Last |  | Dec. 31, 2021 |  |
Multi Employer Plans Status Funded Percentage |  | 89.00% |  |
Pension Fund All Other |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Contributions |  | $ 707 | $ 671 | $ 1,596
Maximum [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Multi Employer Plans Status Funded Percentage |  | 65.00% |  |
[1] | The applicable collective bargaining agreements related to this pension fund expired at various times in 2019. In 2019, we withdrew completely from this pension fund. See Note 4 for further information.
[2] | Under the Multiemployer Pension Reform Act of 2014, the status of this pension fund was critical and declining, as defined under such Act.
[3] | The collective bargaining agreement related to this pension fund expires on December 31, 2020. A single company that was making over 80 percent of the contributions for this pension fund filed for Chapter 11 bankruptcy during 2018 and withdrew from this pension fund without paying its withdrawal liability. For 2018 and 2017, the fund actuary for this pension fund projected insolvency for this pension fund in 2025 and 2049, respectively.
[4] | The applicable collective bargaining agreements related to this pension fund expire at various times through December 31, 2021. Although this pension fund was formally certified in the yellow zone in 2019, the trustees of this pension plan elected voluntarily to place this pension plan in the red zone to take advantage of certain provisions of the Pension Protection Act even though at the end of 2018 this pension plan had a funded status of 89 percent.

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- Definition Indicate the multiemployer plan's certified zone status as currently required by the Pension Protection Act of 2006 or a subsequent amendment thereof. The zone status categories are red (critical status), orange (seriously endangered), yellow (endangered), and green (none of the above). The acceptable values are "red", "orange", "yellow", "green", "other", and "NA". A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan that will expire first in a group of associated collective bargaining arrangements, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan that will expire last in a group of associated collective bargaining arrangements, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Indicate whether a funding improvement plan or rehabilitation plan has been implemented or is pending for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "pending", "implemented", "other", and "NA". + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Indicate whether the employer paid a surcharge to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "yes", and "NA". + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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