Note 9 - Business Segments (Details) - Reconciling Information Between Reportable Segments and Consolidated Totals (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciling Information Between Reportable Segments and Consolidated Totals [Abstract]
Operating income	$ 29,797	$ 12,065	$ 75,343	$ 61,047
Interest income	742	280	870	1,004
Interest expense, net	(18,459)	(15,400)	(51,826)	(44,541)
Foreign currency translation and transaction gains (losses)	1,258	615	3,844	(1,127)
Income attributable to sale of tax benefits	5,027	2,311	14,342	7,417
Other non-operating income, net	137	215	1,583	344
Total income, before income taxes, discontinued operations and equity in losses of investees	$ 18,502	$ 86	$ 44,156	$ 24,144