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, 2013	Mar. 31, 2012
Revenues	$ 231,652	$ 230,594
Gross profit	47,059	52,684
Operating income (loss)	5,281	10,899
United States [Member]
Revenues	144,423	144,322
Gross profit	28,034	35,967
Operating income (loss)	(1,643)	5,641
Canada [Member]
Revenues	39,394	44,390
Gross profit	9,303	11,299
Operating income (loss)	5,748	6,636
Europe [Member]
Revenues	22,651	19,943
Gross profit	5,003	4,443
Operating income (loss)	868	352
Other foreign [Member]
Revenues	25,184	21,939
Gross profit	4,719	975
Operating income (loss)	$ 308	$ (1,730)