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Business Combinations and Asset Acquisitions (Narrative) (Details) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 22, 2021 USD ($) count | Jul. 01, 2021 USD ($) count | Dec. 31, 2021 USD ($)
Business Acquisition [Line Items] |  |  |
Estimated fair value of intangible assets |  |  | $ 57,200
Acquisition of ECM Transport Group [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Percentage of equity interests acquired |  | 80.00% |
Total purchase price (fair value of consideration) |  | $ 141,291 |
Percentage of equity interests owned by noncontrolling interest |  | 20.00% |
Trucks | count |  | 500 |
Trailers | count |  | 2,000 |
Operational facilities | count |  | 8 |
Drop lots | count |  | 18 |
Fixed rate term loan amount used to acquire ECM |  | $ 100,000 |
Business acquisition transaction costs |  | $ 1,000 |
Payments to acquire businesses deposited in escrow |  |  | 1,500
Acquisition of NEHDS [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Percentage of equity interests acquired | 100.00% |  |
Total purchase price (fair value of consideration) | $ 63,054 |  |
Trucks | count | 400 |  |
Warehouse facilities | count | 19 |  |
Business acquisition transaction costs | $ 600 |  |
Payments to acquire businesses deposited in escrow |  |  | 3,100
Minimum potential undiscounted amount of future earnout payments |  |  | 0
Maximum potential undiscounted amount of future earnout payments |  |  | 4,000
Fair value of contingent consideration arrangement |  |  | $ 2,500

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