Legal Matters	12 Months Ended
Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Legal Matters	NOTE 15. Legal Matters Robles and Adame On January 25, 2013, a complaint was filed in the United States District Court for the Eastern District of California by Salvador Robles against our subsidiary HGT. The action was brought on behalf of a putative class comprised of present and former California-based truck drivers who, from January 2009 to September 2014, were classified as independent contractors. The complaint included allegations that HGT misclassified these drivers as independent contractors, as well as various violations of the California Labor Code and that HGT engaged in unfair competition practices. In 2014, most of the subject drivers accepted settlements that were expensed in 2014 and paid. In 2015, the lawsuit was transferred to the United States District Court for the Western District of Tennessee. The complaint sought, among other things, declaratory and injunctive relief, monetary damages and attorney’s fees. In May 2013, the complaint was amended to add similar claims based on Mr. Robles’ status as an employed company driver. These additional claims were only on behalf of Mr. Robles and not a putative class. On August 5, 2015, a suit was filed in state court in San Bernardino County, California on behalf of 63 named plaintiffs against HGT and five Company employees. Plaintiffs in the Adame litigation are represented by the same counsel as represents the plaintiffs in Robles. The Adame lawsuit alleges claims similar to those asserted in the Robles litigation and seeks monetary penalties under the California Private Attorneys General Act. In September 2019, the Company and the plaintiffs in the Robles and Adame matters agreed in principle to settle all claims in both lawsuits for $4.8 million, which the Company recorded in the third quarter of 2019 and is included in "Accrued other" current liabilities on the accompanying Consolidated Balance Sheet. The parties are finalizing the settlement agreements, which are subject to final court approval. The Company is involved in certain other claims and pending litigation arising from the normal conduct of business, including putative class-action lawsuits in which the plaintiffs are current and former California-based drivers who allege claims for unpaid wages, failure to provide meal and rest periods, failure to reimburse incurred business expenses and other items. Based on management's present knowledge, management does not believe that loss contingencies arising from these pending matters are likely to have a material adverse effect on the Company's overall financial position, operating results, or cash flows after taking into account any existing accruals. However, actual outcomes could be material to the Company's financial position, operating results, or cash flows for any particular period.

Legal Matters

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

NOTE 15. Legal Matters

Robles and Adame

On January 25, 2013, a complaint was filed in the United States District Court for the Eastern District of California by Salvador Robles against our subsidiary HGT. The action was brought on behalf of a putative class comprised of present and former California-based truck drivers who, from January 2009 to September 2014, were classified as independent contractors. The complaint included allegations that HGT misclassified these drivers as independent contractors, as well as various violations of the California Labor Code and that HGT engaged in unfair competition practices. In 2014, most of the subject drivers accepted settlements that were expensed in 2014 and paid. In 2015, the lawsuit was transferred to the United States District Court for the Western District of Tennessee. The complaint sought, among other things, declaratory and injunctive relief, monetary damages and attorney’s fees. In May 2013, the complaint was amended to add similar claims based on Mr. Robles’ status as an employed company driver. These additional claims were only on behalf of Mr. Robles and not a putative class.

On August 5, 2015, a suit was filed in state court in San Bernardino County, California on behalf of 63 named plaintiffs against HGT and five Company employees. Plaintiffs in the Adame litigation are represented by the same counsel as represents the plaintiffs in Robles. The Adame lawsuit alleges claims similar to those asserted in the Robles litigation and seeks monetary penalties under the California Private Attorneys General Act.

In September 2019, the Company and the plaintiffs in the Robles and Adame matters agreed in principle to settle all claims in both lawsuits for $4.8 million, which the Company recorded in the third quarter of 2019 and is included in "Accrued other" current liabilities on the accompanying Consolidated Balance Sheet. The parties are finalizing the settlement agreements, which are subject to final court approval.

The Company is involved in certain other claims and pending litigation arising from the normal conduct of business, including putative class-action lawsuits in which the plaintiffs are current and former California-based drivers who allege claims for unpaid wages, failure to provide meal and rest periods, failure to reimburse incurred business expenses and other items. Based on management's present knowledge, management does not believe that loss contingencies arising from these pending matters are likely to have a material adverse effect on the Company's overall financial position, operating results, or cash flows after taking into account any existing accruals. However, actual outcomes could be material to the Company's financial position, operating results, or cash flows for any particular period.