Annual report pursuant to Section 13 and 15(d)

Operations and Summary of Significant Accounting Policies - Self-Insurance Reserve (Details)

v3.22.0.1
Operations and Summary of Significant Accounting Policies - Self-Insurance Reserve (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Aggregate deductible for claims between $0 and $3,000 | Expedited Freight  
Effects of Reinsurance [Line Items]  
Company Risk Retention $ 3,000
Aggregate deductible for claims between $0 and $3,000 | Expedited Freight | Minimum  
Effects of Reinsurance [Line Items]  
Layer 0
Aggregate deductible for claims between $0 and $3,000 | Expedited Freight | Maximum  
Effects of Reinsurance [Line Items]  
Layer 3,000
Aggregate deductible for claims between $0 and $2,000 | Expedited Freight  
Effects of Reinsurance [Line Items]  
Company Risk Retention 2,000
Aggregate deductible for claims between $0 and $2,000 | Expedited Freight | Minimum  
Effects of Reinsurance [Line Items]  
Layer 0
Aggregate deductible for claims between $0 and $2,000 | Expedited Freight | Maximum  
Effects of Reinsurance [Line Items]  
Layer 2,000
Aggregate deductible for claims between $3,000 and $5,000 | Expedited Freight  
Effects of Reinsurance [Line Items]  
Company Risk Retention 6,000
Aggregate deductible for claims between $3,000 and $5,000 | Expedited Freight | Minimum  
Effects of Reinsurance [Line Items]  
Layer 3,000
Aggregate deductible for claims between $3,000 and $5,000 | Expedited Freight | Maximum  
Effects of Reinsurance [Line Items]  
Layer 5,000
Aggregate deductible for claims between $5,000 and $10,000 | Maximum  
Effects of Reinsurance [Line Items]  
Layer 10,000
Aggregate deductible for claims between $5,000 and $10,000 | Expedited Freight  
Effects of Reinsurance [Line Items]  
Company Risk Retention 2,500
Aggregate deductible for claims between $5,000 and $10,000 | Expedited Freight | Minimum  
Effects of Reinsurance [Line Items]  
Layer 5,000
Aggregate deductible for claims between $5,000 and $10,000 | Expedited Freight | Maximum  
Effects of Reinsurance [Line Items]  
Layer 10,000
Aggregate deductible for claims between $0 and $1,000 | Intermodal  
Effects of Reinsurance [Line Items]  
Company Risk Retention 1,000
Aggregate deductible for claims between $0 and $1,000 | Intermodal | Minimum  
Effects of Reinsurance [Line Items]  
Layer 0
Aggregate deductible for claims between $0 and $1,000 | Intermodal | Maximum  
Effects of Reinsurance [Line Items]  
Layer $ 1,000