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Note 13 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | [1] | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | [1] | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenue |  | $ 233,135 | $ 222,914 | $ 219,298 | $ 219,181 | $ 272,268 | $ 243,303 | $ 196,318 | $ 173,566 | $ 894,528 | $ 885,455 | $ 705,007
Operating (loss) income |  | $ 3,695 | $ (1,931) | $ 8,844 | $ 5,426 | $ 22,315 | $ 16,181 | $ 14,065 | $ 6,425 | 16,034 | 58,986 | 28,155
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 894,528 | 885,455 | 705,007
Operating (loss) income |  |  |  |  |  |  |  |  |  | 16,034 | 58,986 | 28,155
Depreciation and amortization (1) | [2] |  |  |  |  |  |  |  |  | 78,879 | 76,156 | 76,447
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 10,302 | 7,298 | 6,009
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | (10,302) | (7,298) | (6,009)
Highway Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 356,521 | 469,308 | 467,992
Highway Services [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 356,521 | 469,308 | 467,992
Operating (loss) income |  |  |  |  |  |  |  |  |  | (1,098) | 32,693 | 14,323
Depreciation and amortization (1) | [2] |  |  |  |  |  |  |  |  | 38,325 | 46,931 | 56,925
Highway Services [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 10,302 | 7,298 | 6,009
Dedicated [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 342,473 | 257,739 | 144,845
Dedicated [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 342,473 | 257,739 | 144,845
Operating (loss) income |  |  |  |  |  |  |  |  |  | 1,026 | 12,699 | 5,244
Depreciation and amortization (1) | [2] |  |  |  |  |  |  |  |  | 37,944 | 28,515 | 19,498
Dedicated [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Managed Freight [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 186,394 | 153,346 | 89,042
Managed Freight [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 186,394 | 153,346 | 89,042
Operating (loss) income |  |  |  |  |  |  |  |  |  | 8,848 | 10,135 | 6,388
Depreciation and amortization (1) | [2] |  |  |  |  |  |  |  |  | 2,583 | 695 | 11
Managed Freight [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Factoring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 9,140 | 5,062 | 3,128
Factoring [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 9,140 | 5,062 | 3,128
Operating (loss) income |  |  |  |  |  |  |  |  |  | 7,258 | 3,459 | 2,200
Depreciation and amortization (1) | [2] |  |  |  |  |  |  |  |  | 27 | 15 | 13
Factoring [Member] | Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
[1] | Includes $40.1 million one-time benefit related to the Tax Act.
[2] | Includes gains and losses on disposition of equipment.

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