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		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues	$ 257,531	$ 224,985	$ 488,125	$ 435,572
Gross profit	62,427	45,840	115,111	87,014
Operating income (loss)	18,363	7,840	29,262	13,329
United States [Member]
Revenues	175,537	136,819	319,861	250,501
Gross profit	47,042	25,202	83,009	44,034
Operating income (loss)	13,019	(1,521)	18,660	(7,689)
Canada [Member]
Revenues	39,369	35,484	83,758	80,465
Gross profit	9,344	9,396	20,643	21,205
Operating income (loss)	5,223	4,934	11,859	12,683
Europe [Member]
Revenues	21,001	27,847	40,943	52,195
Gross profit	5,332	7,201	9,775	12,629
Operating income (loss)	1,745	2,899	2,097	4,202
Other foreign [Member]
Revenues	21,624	24,835	43,563	52,411
Gross profit	709	4,041	1,684	9,146
Operating income (loss)	$ (1,624)	$ 1,528	$ (3,354)	$ 4,133