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Note 16 - Segment Information (Details Textual)
$ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2017

USD ($)

^[1]

Sep. 30, 2017

USD ($)

Jun. 30, 2017

USD ($)

Mar. 31, 2017

USD ($)

Dec. 31, 2016

USD ($)

Sep. 30, 2016

USD ($)

Jun. 30, 2016

USD ($)

Mar. 31, 2016

USD ($)

^[2]

Dec. 31, 2017

USD ($)

Dec. 31, 2016

USD ($)

Dec. 31, 2015

USD ($)

Number of Reportable Segments

2

Revenues

$ 203,306

$ 178,631

$ 164,326

$ 158,744

$ 190,978

$ 164,500

$ 158,832

$ 156,341

$ 705,007

$ 670,651

$ 724,240

Non Asset Operations [Member] | Solutions [Member]

Revenues

$ 3,100

$ 2,600

$ 2,400

[1]	Includes $40.1m one-time benefit related to the Tax Cuts and Jobs Act.
[2]	Adjusted from 10-Q as filed due to implementation of ASU 2016-09.

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: