Note 13 - Segment and Geographical Information (Details) - Reconciliation of Segment Profit to the Consolidated Statement of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Reconciliation of Segment Profit to the Consolidated Statement of Comprehensive Loss [Abstract]
Segment Profit	$ 132,140	[1],[2]	$ 97,461	[1],[2]	$ 79,789	[1],[2]
Depreciation and amortization	(60,280)	[1],[2]	(62,748)	[1],[2]	(58,551)	[1],[2]
Share-based compensation expense	(20,024)		(17,157)		(13,756)
Acquisition related transaction costs	(3,535)		(2,134)		(1,655)
Other expenses	(1,201)		(1,353)		(702)
Income from operations	$ 47,100		$ 14,069		$ 5,125

[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.