Note 7 - Goodwill and Other Intangible Assets, Net Schedule of Acquired Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets		$ 11,800		$ 13,200	$ 13,000
Finite-Lived Intangible Assets, Gross		112,985		113,771
Finite-Lived Intangible Assets, Accumulated Amortization		(59,695)		(32,713)
Finite-Lived Intangible Assets, Net		53,290		81,058
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		82,530	[1]	83,316
Finite-Lived Intangible Assets, Accumulated Amortization		(41,596)	[1]	(19,696)
Finite-Lived Intangible Assets, Net		$ 40,934	[1]	63,620
Customer relationships | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Customer relationships | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Technology-based intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 15,250	[2]	15,250
Finite-Lived Intangible Assets, Accumulated Amortization		(8,922)	[2]	(5,497)
Finite-Lived Intangible Assets, Net		$ 6,328	[2]	9,753
Technology-based intangible assets | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Technology-based intangible assets | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		8 years
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 8,340		8,340
Finite-Lived Intangible Assets, Accumulated Amortization		(3,003)		(2,125)
Finite-Lived Intangible Assets, Net		$ 5,337		6,215
Trademarks and Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		6 years
Trademarks and Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Client backlog
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 6,680		6,680
Finite-Lived Intangible Assets, Accumulated Amortization		(6,006)		(5,235)
Finite-Lived Intangible Assets, Net		$ 674		1,445
Client backlog | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Client backlog | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 185		185
Finite-Lived Intangible Assets, Accumulated Amortization		(168)		(160)
Finite-Lived Intangible Assets, Net		$ 17		$ 25
Noncompete agreements | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		2 years
Noncompete agreements | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Mortgage and Real Estate Services Segment [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 15,800
Mortgage and Real Estate Services Segment [Member] | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived	14,900
Mortgage and Real Estate Services Segment [Member] | Technology-based intangible assets
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 900

[1] Includes an impairment charge of $14.9 million.

[2] Includes an impairment charge of $0.9 million.