Note 2 - Accounting Policies (Detail) - Financial Data for Investments in Affiliated Companies (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue			$ 102,407	$ 101,387
Gross profit			28,620	22,098
Net income			15,382	9,627
Equity in earnings of affiliated companies	$ 2,001	$ 916	$ 4,389	$ 2,531