Note 13 - Segment and Geographical Information (Detail) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues by Country	$ 130,085	$ 109,218	$ 381,600	$ 282,548
United States [Member]
Revenues by Country	84,784	78,054	260,442	217,597
Canada [Member]
Revenues by Country	6,553	4,090	20,457	14,387
United Kingdom [Member]
Revenues by Country	33,521	27,074	95,474	50,564
Australia [Member]
Revenues by Country	$ 5,227		$ 5,227