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Note 19 - Quarterly Data and Share Information (Unaudited) (Details) - Consolidated Financial Data (USD $)
In Thousands, except Per Share data, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 28, 2014

Sep. 28, 2014

Jun. 29, 2014

Mar. 30, 2014

Dec. 29, 2013

Sep. 29, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 28, 2014

Dec. 29, 2013

Dec. 30, 2012

Note 19 - Quarterly Data and Share Information (Unaudited) (Details) - Consolidated Financial Data [Line Items]

Net sales (in Dollars)

$ 251,689us-gaap_SalesRevenueNet

^[1]

$ 254,448us-gaap_SalesRevenueNet

$ 243,483us-gaap_SalesRevenueNet

$ 210,369us-gaap_SalesRevenueNet

$ 272,096us-gaap_SalesRevenueNet

^[2]

$ 252,191us-gaap_SalesRevenueNet

^[3]

$ 260,624us-gaap_SalesRevenueNet

$ 218,992us-gaap_SalesRevenueNet

$ 1,003,903us-gaap_SalesRevenueNet

^[4]

$ 959,989us-gaap_SalesRevenueNet

^[4]

$ 932,020us-gaap_SalesRevenueNet

^[4]

Gross profit (in Dollars)

91,871us-gaap_GrossProfit

^[1]

91,753us-gaap_GrossProfit

86,233us-gaap_GrossProfit

71,252us-gaap_GrossProfit

91,361us-gaap_GrossProfit

^[2]

83,595us-gaap_GrossProfit

^[3]

90,385us-gaap_GrossProfit

74,686us-gaap_GrossProfit

340,027us-gaap_GrossProfit

341,109us-gaap_GrossProfit

317,179us-gaap_GrossProfit

Net income (loss) (in Dollars)

$ 15,336us-gaap_NetIncomeLoss

^[1]

$ 14,957us-gaap_NetIncomeLoss

$ 10,965us-gaap_NetIncomeLoss

$ 6,997us-gaap_NetIncomeLoss

$ 8,088us-gaap_NetIncomeLoss

^[2]

$ (376)us-gaap_NetIncomeLoss

^[3]

$ 13,071us-gaap_NetIncomeLoss

$ 4,025us-gaap_NetIncomeLoss

Basic income (loss) per share

$ 0.23us-gaap_EarningsPerShareBasic

^[1]

$ 0.23us-gaap_EarningsPerShareBasic

$ 0.17us-gaap_EarningsPerShareBasic

$ 0.11us-gaap_EarningsPerShareBasic

$ 0.12us-gaap_EarningsPerShareBasic

^[2]

$ (0.01)us-gaap_EarningsPerShareBasic

^[3]

$ 0.20us-gaap_EarningsPerShareBasic

$ 0.06us-gaap_EarningsPerShareBasic

$ 0.37us-gaap_EarningsPerShareBasic

$ 0.73us-gaap_EarningsPerShareBasic

$ 0.09us-gaap_EarningsPerShareBasic

Diluted income (loss) per share

$ 0.23us-gaap_EarningsPerShareDiluted

^[1]

$ 0.23us-gaap_EarningsPerShareDiluted

$ 0.17us-gaap_EarningsPerShareDiluted

$ 0.11us-gaap_EarningsPerShareDiluted

$ 0.12us-gaap_EarningsPerShareDiluted

^[2]

$ (0.01)us-gaap_EarningsPerShareDiluted

^[3]

$ 0.20us-gaap_EarningsPerShareDiluted

$ 0.06us-gaap_EarningsPerShareDiluted

$ 0.37us-gaap_EarningsPerShareDiluted

$ 0.73us-gaap_EarningsPerShareDiluted

$ 0.09us-gaap_EarningsPerShareDiluted

Maximum [Member]

Share prices

Share price

$ 21.74us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

^[1]

$ 20.30us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

$ 19.86us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

$ 19.96us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

$ 16.74us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

^[2]

$ 19.41us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

^[3]

$ 21.13us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

$ 22.46us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

$ 21.74us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

^[1]

$ 16.74us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember

^[2]

Minimum [Member]

Share prices

Share price

$ 18.54us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

^[1]

$ 16.73us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

$ 15.13us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

$ 15.76us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

$ 12.98us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

^[2]

$ 15.72us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

^[3]

$ 17.11us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

$ 18.63us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

$ 18.54us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

^[1]

$ 12.98us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember

^[2]

[1]	The fourth quarter of 2013 includes a gain of $7.0 million related to final settlement of the Company's fire insurance claim in Australia. The fourth quarter of 2013 also includes $1.7 million of expenses related to debt retirement.
[2]	Results for the fourth quarter of 2014 include debt retirement expenses of $12.0 million.
[3]	Results for the third quarter of 2014 include restructuring and asset impairment charges of $12.4 million.
[4]	Revenue attributed to geographic areas is based on the location of the customer.

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