Note 19 - Business Segments (Details) - Revenues as Reported in the Geographic Area (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenues from external customers attributable to: (1)
Revenues from External Customers	$ 533,239	[1]	$ 501,773	[1]	$ 425,456	[1]
North America [Member]
Revenues from external customers attributable to: (1)
Revenues from External Customers	314,666	[1]	271,845	[1]	254,265	[1]
Pacific Rim [Member]
Revenues from external customers attributable to: (1)
Revenues from External Customers	20,082	[1]	109,177	[1]	32,174	[1]
Latin America [Member]
Revenues from external customers attributable to: (1)
Revenues from External Customers	21,879	[1]	27,939	[1]	27,377	[1]
Africa [Member]
Revenues from external customers attributable to: (1)
Revenues from External Customers	68,746	[1]	40,885	[1]	36,307	[1]
Far East [Member]
Revenues from external customers attributable to: (1)
Revenues from External Customers	10,582	[1]	2,075	[1]	13,363	[1]
Europe [Member]
Revenues from external customers attributable to: (1)
Revenues from External Customers	$ 97,284	[1]	$ 49,852	[1]	$ 61,970	[1]

[1] Revenues as reported in the geographic area in which they originate.