Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassifications - During the fourth quarter of 2020, the Company changed its financial statement presentation related to gain/loss on its SERP investments. These gains/losses were previously included within cost of sales and selling, general and administrative expense. The loss on SERP investment in the amount of $2.0 million has been reclassified from cost of sales ($0.6 million) and selling, general and administrative expenses ($1.4 million), to other income (expense), net on the accompanying condensed consolidated statement of operations for the three months ended March 31, 2020. All amounts included in the tables to these notes to condensed consolidated financial statements, except per share amounts, are in thousands.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Standards In August 2018, the FASB issued ASU 2018-14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans ("ASU 2018-14"). This guidance removes certain disclosures that are not considered cost beneficial, clarifies certain required disclosures and adds additional disclosures. The Company adopted amendments in ASU 2018-14 on a retrospective basis effective January 1, 2021. The adoption of this guidance will modify the Company's annual disclosures for its defined benefit plan, but did not have any impact on the Company's consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes ("ASU 2019-12"), which modifies ASC 740 to reduce complexity while maintaining or improving the usefulness of the information provided to users of financial statements. This guidance was adopted by the Company effective January 1, 2021 and did not have a material impact on the Company’s consolidated financial statements. *Accounting Standards Issued But Not* Yet Adopted** In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), as amended. The new guidance will broaden the information that an entity must consider in developing its expected credit loss estimates related to its financial instruments and adds to U.S. GAAP an impairment model that is based on expected losses rather than incurred losses. The amendment is currently effective for the Company for annual reporting periods beginning after December 15, 2022, with early adoption permitted. Management is currently assessing the impact of ASU 2016-13, but it is not expected to have a material impact on the Company’s consolidated financial statements. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ("ASU 2020-04"). ASU 2020-04 provides temporary optional guidance on contract modifications and hedging accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) to alternative reference rates. In January 2021, the FASB issued ASU 2021-01, which refines the scope of Topic 848 and clarifies some of its guidance as part of the FASB’s monitoring of global reference rate activities. The new guidance was effective upon issuance, and the Company is allowed to elect to apply the amendments prospectively through December 31, 2022. Management is currently evaluating the impact of this accounting standard update on the Company's consolidated financial statements and related disclosures.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Reclassification, Comparability Adjustment [Policy Text Block]

Reclassifications - During the fourth quarter of 2020, the Company changed its financial statement presentation related to gain/loss on its SERP investments. These gains/losses were previously included within cost of sales and selling, general and administrative expense. The loss on SERP investment in the amount of $2.0 million has been reclassified from cost of sales ($0.6 million) and selling, general and administrative expenses ($1.4 million), to other income (expense), net on the accompanying condensed consolidated statement of operations for the three months ended March 31, 2020.

All amounts included in the tables to these notes to condensed consolidated financial statements, except per share amounts, are in thousands.

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Adopted Accounting Standards

In August 2018, the FASB issued ASU 2018-14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans ("ASU 2018-14"). This guidance removes certain disclosures that are not considered cost beneficial, clarifies certain required disclosures and adds additional disclosures. The Company adopted amendments in ASU 2018-14 on a retrospective basis effective January 1, 2021. The adoption of this guidance will modify the Company's annual disclosures for its defined benefit plan, but did not have any impact on the Company's consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes ("ASU 2019-12"), which modifies ASC 740 to reduce complexity while maintaining or improving the usefulness of the information provided to users of financial statements. This guidance was adopted by the Company effective January 1, 2021 and did not have a material impact on the Company’s consolidated financial statements.

Accounting Standards Issued But Not Yet Adopted

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), as amended. The new guidance will broaden the information that an entity must consider in developing its expected credit loss estimates related to its financial instruments and adds to U.S. GAAP an impairment model that is based on expected losses rather than incurred losses. The amendment is currently effective for the Company for annual reporting periods beginning after December 15, 2022, with early adoption permitted. Management is currently assessing the impact of ASU 2016-13, but it is not expected to have a material impact on the Company’s consolidated financial statements.

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ("ASU 2020-04"). ASU 2020-04 provides temporary optional guidance on contract modifications and hedging accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) to alternative reference rates. In January 2021, the FASB issued ASU 2021-01, which refines the scope of Topic 848 and clarifies some of its guidance as part of the FASB’s monitoring of global reference rate activities. The new guidance was effective upon issuance, and the Company is allowed to elect to apply the amendments prospectively through December 31, 2022. Management is currently evaluating the impact of this accounting standard update on the Company's consolidated financial statements and related disclosures.