Note 1 - Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Research and Development Expense	$ 14,500,000	$ 13,900,000	$ 12,600,000
Interest Paid	4,800,000	21,000,000	22,900,000
Income Taxes Paid	7,200,000	7,500,000	8,700,000
Proceeds from Income Tax Refunds	3,100,000	5,000,000	1,400,000
Interest Costs Capitalized	300,000	800,000	800,000
Depreciation	30,400,000	30,300,000	24,400,000
Finite-Lived Intangible Assets, Accumulated Amortization	77,300,000	77,300,000
Goodwill, Impaired, Accumulated Impairment Loss	212,600,000	212,600,000
Goodwill	63,890,000	70,509,000
Other Intangible Assets, Net	4,800,000	4,700,000
Amortization of Intangible Assets	300,000	300,000	300,000
Goodwill, Impairment Loss	$ 0	0	0
Fair Value Estimates of Reporting Units Threshold for No Goodwill Impairment, Percent of Decrease in Fair Value Estimates	10.00%
Product Warranty Period, Lower Range	10 years
Product Warranty Period, Upper Range	20 years
Workmanship Warranty Period	1 year
Warranty and Sales Allowances Payable, Current	$ 4,759,000	3,957,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	$ (32,600,000)	$ (28,400,000)	$ (5,200,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	0	2,014	0
Accrual for Environmental Loss Contingencies	$ 0	$ 0
Allowance for Doubtful Accounts Receivable	4,500,000	5,900,000
Accrued Expenses [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Warranty and Sales Allowances Payable, Current	$ 4,800,000	$ 4,000,000
Minimum [Member] | Building and Building Improvements [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Minimum [Member] | Furniture and Equipment [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member] | Building and Building Improvements [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Maximum [Member] | Furniture and Equipment [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	12 years