Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 251,044		$ 273,385
Accumulated Amortization	(68,771)		(64,102)
Net Carrying Amount	182,273		209,283
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	5 years
Gross Carrying Amount	3,908		3,917
Accumulated Amortization	(3,131)		(2,977)
Net Carrying Amount	777		940
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	0 years
Gross Carrying Amount	4,731		4,745
Accumulated Amortization	(4,731)		(4,745)
Net Carrying Amount	0		0
Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	12 years
Gross Carrying Amount	2,067		2,067
Accumulated Amortization	(623)		(477)
Net Carrying Amount	1,444		1,590
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	16 years
Gross Carrying Amount	21,722		21,394
Accumulated Amortization	(5,199)		(4,167)
Net Carrying Amount	16,523		17,227
Non-competes [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	4 years
Gross Carrying Amount	1,140		1,140
Accumulated Amortization	(839)		(753)
Net Carrying Amount	301		387
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	13 years	[1],[2]
Gross Carrying Amount	163,386	[1],[2]	182,703	[1],[2]
Accumulated Amortization	(32,196)	[1],[2]	(28,287)	[1],[2]
Net Carrying Amount	131,190	[1],[2]	154,416	[1],[2]
Patents and acquired technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	16 years	[3]
Gross Carrying Amount	54,090	[3]	57,419	[3]
Accumulated Amortization	(22,052)	[3]	(22,696)	[3]
Net Carrying Amount	$ 32,038	[3]	$ 34,723	[3]

[1] During the third quarter of 2014, the Company recorded an intangible asset impairment of $10.9 million related to realignment efforts at Bayou (see Note 2).

[2] During the fourth quarter of 2014, the Company recorded an intangible asset impairment of $1.4 million related to Fyfe (see Note 2).

[3] During the fourth quarter of 2014, the Company wrote off approximately $2.7 million in patents primarily related to Europe and in connection with the 2014 Restructuring Plan (see Note 3).