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Note 22 - Segment Information - Revenues and Long-lived Assets by Geographic Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenues	$ 2,275,362	$ 1,896,724
Total long-lived assets	722,065	552,837
UNITED STATES
Revenues	984,740	734,488
Total long-lived assets	281,588	178,908
CANADA
Revenues	288,537	253,529
Total long-lived assets	61,158	52,547
Euro Currency Countries [Member]
Revenues	261,821	261,626
Total long-lived assets	191,934	174,932
AUSTRALIA
Revenues	245,385	219,406
Total long-lived assets	50,843	43,808
UNITED KINGDOM
Revenues	166,685	137,216
Total long-lived assets	75,745	69,565
Other Geographic Locations [Member]
Revenues	328,194	290,459
Total long-lived assets	$ 60,797	$ 33,077

X

- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

+ Details

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Balance Type:	debit
Period Type:	instant

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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