Note 2 - Summary of Accounting Policies (Detail) - Investments in Affiliated Companies - Income Statement Data (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Equity in earnings of affiliated companies	$ 3,471	$ 7,291	$ 1,192
Investments In Affiliated Companies [Member]
Revenues	134,716	134,884	108,567
Gross profit	29,651	36,095	25,029
Net income	12,512	19,497	6,062
Equity in earnings of affiliated companies	$ 3,471	$ 7,291	$ 1,192