XML 44 R30.htm IDEA: XBRL DOCUMENT v3.20.4
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Number of reportable segments   2  
Pre-tax increase in depreciation expense from a change in the Tractor Fleet salvage value percentage   $ 2,700  
Restricted cash   243 $ 0
Outstanding checks   5,200 2,100
Impairment of assets held for sale   588 786
Impairment of Goodwill   0 0
Treasury stock reissued at lower than repurchase price   4,300 4,800
Contract asset   $ 1,100 $ 900
Salvage Value      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Tractor Fleet previous salvage value (as a percent) 30.00%    
Tractor Fleet salvage value (as a percent) 25.00%    
Minimum | Structures      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Property, plant and equipment, useful life   15 years  
Minimum | Transportation Equipment      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Property, plant and equipment, useful life   5 years  
Minimum | Other Machinery and Equipment      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Property, plant and equipment, useful life   3 years  
Maximum | Structures      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Property, plant and equipment, useful life   40 years  
Maximum | Transportation Equipment      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Property, plant and equipment, useful life   14 years  
Maximum | Other Machinery and Equipment      
Collaborative Arrangements and Non-collaborative Arrangement Transactions      
Property, plant and equipment, useful life   10 years