Note 12 - Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Note 12 - Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax [Line Items]
Net actuarial loss	$ 42,472	$ 23,689
Net amount recognized / occurring, pre-tax	42,472	23,689
United States Pension Plan of US Entity [Member]
Note 12 - Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax [Line Items]
Net actuarial loss	34,801	18,095
Net amount recognized / occurring, pre-tax	34,801	18,095
Foreign Pension Plan [Member]
Note 12 - Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax [Line Items]
Net actuarial loss	7,671	5,594
Net amount recognized / occurring, pre-tax	$ 7,671	$ 5,594