Note 13 - Segment and Geographical Information (Details) - Reconciliation of Segment Profit to the Consolidated Statement of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Reconciliation of Segment Profit to the Consolidated Statement of Comprehensive Loss [Abstract]
Segment Profit	$ 36,083	[1],[2]	$ 23,885	[1],[2]	$ 98,672	[1],[2]	$ 71,896	[1],[2]
Depreciation and amortization	(15,705)	[1],[2]	(15,910)	[1],[2]	(44,905)	[1],[2]	(48,058)	[1],[2]
Share-based compensation expense	(4,680)		(3,820)		(14,660)		(12,234)
Acquisition related transaction costs	(871)		(186)		(2,825)		(1,093)
Other expenses	(585)		24		(771)		(650)
Income from operations	$ 14,242		$ 3,993		$ 35,511		$ 9,861

[1] For segment purposes, the Company defines segment profit as earnings before interest expenses, income taxes, depreciation and amortization, share-based compensation expenses, acquisition related transaction costs and other expenses. A consolidated reconciliation from segment profit to income from operations is included below.

[2] Long-lived assets are noncurrent assets excluding deferred tax assets and deferred financing costs.