Note 14 - Supplemental Condensed Consolidating Guarantor Financial Statements (Details) - Condensed Consolidating Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Condensed Cash Flow Statements, Captions [Line Items]
Purchase of plant and equipment	$ (33,822)	$ (21,747)
Cash received from insurance company	19,774	0
Net cash used for investing activities	(15,621)	(22,884)
Other	(1,573)	(1,137)
Proceeds from issuance of common stock	1,256	131
Dividends paid	(3,309)	(2,627)
Net cash provided by (used for) financing activities	(2,053)	(13,973)
Effect of exchange rate change on cash	(2,453)	(329)
Net increase (decrease) in cash	(29,163)	(13,757)
Cash	61,370	36,878
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(745)
Purchase of plant and equipment	0
Other	0
Cash received from insurance company	0
Net cash used for investing activities	0
Other	745
Proceeds from issuance of common stock	0
Dividends paid	0
Net cash provided by (used for) financing activities	745
Effect of exchange rate change on cash	0
Net increase (decrease) in cash	0
Cash	0
Consolidation, Eliminations [Member] | Beginning of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	0
Consolidation, Eliminations [Member] | End of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	0
Consolidated Totals [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(9,036)
Purchase of plant and equipment	(33,822)
Other	(1,573)
Cash received from insurance company	19,774
Net cash used for investing activities	(15,621)
Other	0
Proceeds from issuance of common stock	1,256
Dividends paid	(3,309)
Net cash provided by (used for) financing activities	(2,053)
Effect of exchange rate change on cash	(2,453)
Net increase (decrease) in cash	(29,163)
Consolidated Totals [Member] | Beginning of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	90,533
Consolidated Totals [Member] | End of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	61,370
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	3,911
Purchase of plant and equipment	(13,188)
Other	(435)
Cash received from insurance company	0
Net cash used for investing activities	(13,623)
Other	7,685
Proceeds from issuance of common stock	0
Dividends paid	0
Net cash provided by (used for) financing activities	7,685
Effect of exchange rate change on cash	0
Net increase (decrease) in cash	(2,027)
Cash	1,905
Guarantor Subsidiaries [Member] | Beginning of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	3,932
Guarantor Subsidiaries [Member] | End of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	1,905
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(14,112)
Purchase of plant and equipment	(20,569)
Other	(456)
Cash received from insurance company	19,774
Net cash used for investing activities	(1,251)
Other	12,457
Proceeds from issuance of common stock	0
Dividends paid	0
Net cash provided by (used for) financing activities	12,457
Effect of exchange rate change on cash	(2,453)
Net increase (decrease) in cash	(5,359)
Cash	30,966
Non-Guarantor Subsidiaries [Member] | Beginning of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	36,325
Non-Guarantor Subsidiaries [Member] | End of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	30,966
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,910
Purchase of plant and equipment	(65)
Other	(682)
Cash received from insurance company	0
Net cash used for investing activities	(747)
Other	(20,887)
Proceeds from issuance of common stock	1,256
Dividends paid	(3,309)
Net cash provided by (used for) financing activities	(22,940)
Effect of exchange rate change on cash	0
Net increase (decrease) in cash	(21,777)
Cash	28,499
Parent Company [Member] | Beginning of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	50,276
Parent Company [Member] | End of Period [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash	$ 28,499