Note 17 - Segment Information (Details) - Financial Information Regarding Each Reportable Segment (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net Sales:
Net Sales	$ 183,726	$ 182,132
Operating (loss) profit:
Operating Profit (loss)	3,992	29,776
Performance Materials [Member]
Net Sales:
Net Sales	143,111	138,824
Operating (loss) profit:
Operating Profit (loss)	8,839	21,447
Graphic Solutions [Member]
Net Sales:
Net Sales	40,615	43,308
Operating (loss) profit:
Operating Profit (loss)	$ (4,847)	$ 8,329