Note 19 - Foreign Operations and Sales - Summary of Gross Sales and Long Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Gross sales	$ 178,682	$ 99,867	$ 119,054	$ 93,935	$ 156,943	$ 92,350	$ 106,379	$ 78,184	$ 491,538	$ 433,856	$ 374,150
Long-lived assets	272,215				225,241				272,215	225,241	216,381
Domestic [Member]
Gross sales									270,773	237,146	186,735
Long-lived assets	136,692				93,142				136,692	93,142	64,995
Foreign [Member]
Gross sales									220,765	196,710	187,415
Long-lived assets	$ 135,523				$ 132,099				$ 135,523	$ 132,099	$ 151,386