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Discontinued Operation and Held for Sale (Tables)
 6 Months Ended
Jun. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]  
Weighted Average Assumptions
The weighted-average assumptions under the Monte Carlo simulation model were as follows:

February 12, 2021
Counterparty credit spread1.2%
Earnings before interest, taxes, depreciation and amortization discount rate15.0%
Asset volatility55.0%
Summarized Held for Sale and Discontinued Operations Financial Information
A summary of the results of operations classified as a discontinued operation, net of tax, in the Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2021 and 2020 is as follows:

 Three Months EndedSix Months Ended
 June 30,
2021		June 30,
2020		June 30,
2021		June 30,
2020
Operating revenues$— $13,974 $17,087 $50,926 
Operating expenses:  
Purchased transportation— 3,147 4,290 12,683 
Salaries, wages and employee benefits— 8,394 9,674 25,507 
Operating leases— 4,966 2,907 10,646 
Depreciation and amortization— 362 — 1,657 
Insurance and claims— 1,287 929 3,013 
Fuel expense— 413 644 1,740 
Other operating expenses— 3,495 2,087 7,841 
Total operating expenses— 22,064 20,531 63,087 
Loss from discontinued operation— (8,090)(3,444)(12,161)
Loss on sale of business — — (2,860)— 
Loss from discontinued operation before income taxes— (8,090)(6,304)(12,161)
Income tax benefit— (2,019)(771)(3,049)
Loss from discontinued operation, net of tax$— $(6,071)$(5,533)$(9,112)