Note 16 - Restatement (Details) - Restated Balances of Affected Line Items (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Dec. 29, 2012
Note 16 - Restatement (Details) - Restated Balances of Affected Line Items [Line Items]
Accrued income taxes	$ 11,502		$ 11,559
Total current liabilities	158,937		155,420
Total equity	597,365		587,558
Consolidated Statements of Income:
Income taxes	6,484	7,212
Net income	11,488	17,563
Accrued taxes	(640)	1,275
Net income per share:
Basic (in Dollars per share)	$ 0.52	$ 0.81
Diluted (in Dollars per share)	$ 0.51	$ 0.80
Consolidated Statements of Comprehensive Income:
Comprehensive income	7,662	26,705
Scenario, Previously Reported [Member]
Note 16 - Restatement (Details) - Restated Balances of Affected Line Items [Line Items]
Accrued income taxes	8,196
Total current liabilities	155,631
Total equity	600,671
Consolidated Statements of Income:
Income taxes	3,178
Net income	14,794
Accrued taxes	(3,946)
Net income per share:
Basic (in Dollars per share)	$ 0.67
Diluted (in Dollars per share)	$ 0.66
Consolidated Statements of Comprehensive Income:
Comprehensive income	10,968
Scenario, Adjustment [Member]
Note 16 - Restatement (Details) - Restated Balances of Affected Line Items [Line Items]
Accrued income taxes	3,306
Total current liabilities	3,306
Total equity	(3,306)
Consolidated Statements of Income:
Income taxes	3,306
Net income	(3,306)
Accrued taxes	3,306
Net income per share:
Basic (in Dollars per share)	$ (0.15)
Diluted (in Dollars per share)	$ (0.15)
Consolidated Statements of Comprehensive Income:
Comprehensive income	$ (3,306)