Note 13 - Segment and Geographical Information (Details) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Note 13 - Segment and Geographical Information (Details) - Revenues by Geographic Area [Line Items]
Revenues by Country	$ 152,354	$ 130,085	$ 457,205	$ 381,600
United States [Member]
Note 13 - Segment and Geographical Information (Details) - Revenues by Geographic Area [Line Items]
Revenues by Country	93,963	84,784	280,634	260,442
Canada [Member]
Note 13 - Segment and Geographical Information (Details) - Revenues by Geographic Area [Line Items]
Revenues by Country	7,290	6,553	22,986	20,457
United Kingdom [Member]
Note 13 - Segment and Geographical Information (Details) - Revenues by Geographic Area [Line Items]
Revenues by Country	34,604	33,521	103,645	95,474
Australia [Member]
Note 13 - Segment and Geographical Information (Details) - Revenues by Geographic Area [Line Items]
Revenues by Country	$ 16,497	$ 5,227	$ 49,940	$ 5,227