Note 9 - Segment Reporting (Detail) - Summary of Revenues, Gross Profit and Operating Income (Loss) by Geographic Region (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues	$ 230,594	$ 210,587
Gross profit	52,684	41,174
Operating income (loss)	10,899	5,489
United States [Member]
Revenues	144,322	113,682
Gross profit	35,967	18,832
Operating income (loss)	5,641	(6,168)
Canada [Member]
Revenues	44,390	44,981
Gross profit	11,299	11,809
Operating income (loss)	6,636	7,749
Europe [Member]
Revenues	19,943	24,348
Gross profit	4,443	5,428
Operating income (loss)	352	1,303
Other foreign [Member]
Revenues	21,939	27,576
Gross profit	975	5,105
Operating income (loss)	$ (1,730)	$ 2,605