Note 16 - Restructuring Activities (Details) - Activity in Restructuring Liabilities (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Balance			$ 2,029	$ 632
Charges to Expense	404	46	404	1,652
Cash Payments			(1,032)	(755)
Non-cash Adjustments			(76)	(9)
Balance	1,325	1,520	1,325	1,520
Graphic Solutions [Member] | Severance and Other Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Balance			699
Charges to Expense			179	1,508
Cash Payments			(291)	(643)
Balance	587	865	587	865
Graphic Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Balance			699
Charges to Expense			179	1,508
Cash Payments			(291)	(643)
Balance	587	865	587	865
Performance Materials [Member] | Severance and Other Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Balance			1,330	632
Charges to Expense			225	144
Cash Payments			(741)	(112)
Non-cash Adjustments			(76)	(9)
Balance	738	655	738	655
Performance Materials [Member]
Restructuring Cost and Reserve [Line Items]
Balance			1,330	632
Charges to Expense			225	144
Cash Payments			(741)	(112)
Non-cash Adjustments			(76)	(9)
Balance	$ 738	$ 655	$ 738	$ 655