Note 5 - Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Goodwill [Table Text Block]

	201 6			201 5
Balance as of January 1	$	687,404		$	687,778
Goodwill resulting from the Trade NT E business combination		191			—
Goodwill resulting from the Mostra business combination (1) (2)		654			(380	)
Goodwill resulting from the CityTech business combination (1)		—			(29	)
Goodwill resulting from the Olson business combination (1) (2)		267			3,410
Effect of foreign currency translation		(4,833	)		(3,375	)
Balance as of December 31	$	683,683		$	687,404

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	2016
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Customer-related	$	115,806	$	(70,090	)	$	45,716
Developed technology		1,463		(1,145	)		318
Total amortizable intangible assets		117,269		(71,235	)		46,034
Intangible with indefinite life		95		—			95
Total intangible assets	$	117,364	$	(71,235	)	$	46,129

	2015
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Customer-related	$	117,654	$	(59,412	)	$	58,242
Developed technology		1,463		(806	)		657
Total intangible assets	$	119,117	$	(60,218	)	$	58,899

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year ending December 31,
2017	$	10,846
2018		8,432
2019		6,124
2020		4,527
2021		4,082
Thereafter		12,023
Total	$	46,034