Note 16 - Supplemental Condensed Consolidating Guarantor Financial Statements (Details) - Condensed Consolidating Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 27,239	$ 43,904
Purchase of plant and equipment	(47,939)	(28,817)
Other	1,875	(1,527)
Cash received from insurance company	23,024	10,000
Net cash used for investing activities	(23,040)	11,830
Proceeds from issuance of common stock	1,163	293
Dividends paid	(5,294)	(4,276)
Net cash provided by (used for) financing activities	(4,131)	(15,460)
Effect of exchange rate change on cash	(1,219)	753
Net increase (decrease) in cash	(1,151)	41,027
Cash	89,382	91,651
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(1,404)
Purchase of plant and equipment	0
Other	0
Cash received from insurance company	0
Net cash used for investing activities	0
Other	1,404
Proceeds from issuance of common stock	0
Dividends paid	0
Net cash provided by (used for) financing activities	1,404
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 operating activities	27,239
Purchase of plant and equipment	(47,939)
Other	1,875
Cash received from insurance company	23,024
Net cash used for investing activities	(23,040)
Other	0
Proceeds from issuance of common stock	1,163
Dividends paid	(5,294)
Net cash provided by (used for) financing activities	(4,131)
Effect of exchange rate change on cash	(1,219)
Net increase (decrease) in cash	(1,151)
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	89,382
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	15,364
Purchase of plant and equipment	(15,427)
Other	(297)
Cash received from insurance company	0
Net cash used for investing activities	(15,724)
Other	(1,016)
Proceeds from issuance of common stock	0
Dividends paid	0
Net cash provided by (used for) financing activities	(1,016)
Effect of exchange rate change on cash	0
Net increase (decrease) in cash	(1,376)
Cash	2,556
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	2,556
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	6,871
Purchase of plant and equipment	(32,429)
Other	3,470
Cash received from insurance company	23,024
Net cash used for investing activities	(5,935)
Other	7,741
Proceeds from issuance of common stock	0
Dividends paid	0
Net cash provided by (used for) financing activities	7,741
Effect of exchange rate change on cash	(1,219)
Net increase (decrease) in cash	7,458
Cash	43,783
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	43,783
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	6,408
Purchase of plant and equipment	(83)
Other	(1,298)
Cash received from insurance company	0
Net cash used for investing activities	(1,381)
Other	(8,129)
Proceeds from issuance of common stock	1,163
Dividends paid	(5,294)
Net cash provided by (used for) financing activities	(12,260)
Effect of exchange rate change on cash	0
Net increase (decrease) in cash	(7,233)
Cash	43,043
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	$ 43,043