Note 13 - Segment and Geographical Information (Detail) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues by Country	$ 521,237	$ 397,860	$ 163,511
United States [Member]
Revenues by Country	340,200	298,056	147,918
Canada [Member]
Revenues by Country	27,595	21,271	9,710
United Kingdom [Member]
Revenues by Country	131,278	78,533	5,883
Australia [Member]
Revenues by Country	$ 22,164