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Discontinued Operation and Held for Sale (Tables)
3 Months Ended
Mar. 31, 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 months ended March 31, 2021 and 2020 is as follows:
 Three Months Ended
 March 31,
2021
March 31,
2020
Operating revenue$17,087 $36,952 
Operating expenses: 
Purchased transportation4,290 9,536 
Salaries, wages and employee benefits9,674 17,113 
Operating leases2,907 5,680 
Depreciation and amortization— 1,295 
Insurance and claims929 1,726 
Fuel expense644 1,327 
Other operating expenses2,087 4,345 
Total operating expenses20,531 41,022 
Loss from discontinued operation(3,444)(4,070)
Loss on sale of business (2,860)— 
Loss from discontinued operation before income taxes(6,304)(4,070)
Income tax benefit(771)(1,030)
Loss from discontinued operation, net of tax$(5,533)$(3,040)