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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.

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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- Definition

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+ References

No definition available.

+ Details

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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