Note 10 - Benefit Plans - Benefit Plan Related Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Dec. 27, 2014
Change in benefit obligation:
Benefit obligation at beginning of year	$ 50,282	$ 158,499
Service cost	1,509	1,574
Interest cost	1,662	4,828
Net actuarial loss (gain)	10,190	(8,479)
Benefits paid from the trust	(2,329)	(102,207)
Benefits paid directly by company	250	(410)
Curtailments and settlements	(427)	(294)
Acquisitions	2,023
Effect of exchange rate movements	(7,554)	(3,229)
Benefit obligation at end of year	55,606	50,282	$ 158,499
Change in plan assets at fair value:
Fair value of plan assets at beginning of year	44,629	141,584
Actual return on plan assets	6,929	(1,986)
Employer contributions	(126)
Employer contributions		9,931
Benefits paid from the trust	(2,329)	(102,207)
Acquisitions	24
Effect of exchange rate movements	(6,919)	(2,693)
Fair value of plan assets at end of year	42,208	44,629	141,584
Net amount recognized/(unfunded status)	(13,398)	(5,653)
Amounts recognized in the Consolidated Balance Sheet consist of:
Accrued benefit liability	(13,398)	(5,653)
Total liability recognized	(13,398)	(5,653)
Accumulated other comprehensive loss	13,107	9,383
Foreign Pension Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	50,282	52,740
Service cost	1,509	824	925
Interest cost	1,662	1,735	2,060
Net actuarial loss (gain)	10,190	648
Benefits paid from the trust	(2,329)	(1,732)
Benefits paid directly by company	250	(410)
Curtailments and settlements	(427)	(294)
Acquisitions	2,023
Effect of exchange rate movements	(7,554)	(3,229)
Benefit obligation at end of year	55,606	50,282	52,740
Change in plan assets at fair value:
Fair value of plan assets at beginning of year	44,629	47,593
Actual return on plan assets	6,588	389
Employer contributions	215	1,072
Benefits paid from the trust	(2,329)	(1,732)
Acquisitions	24
Effect of exchange rate movements	(6,919)	(2,693)
Fair value of plan assets at end of year	42,208	44,629	47,593
Net amount recognized/(unfunded status)	(13,398)	(5,653)
Amounts recognized in the Consolidated Balance Sheet consist of:
Accrued benefit liability	(13,398)	(5,653)
Total liability recognized	(13,398)	(5,653)
Accumulated other comprehensive loss	13,107	9,383
United States Pension Plan of US Entity [Member]
Change in benefit obligation:
Benefit obligation at beginning of year		105,759
Service cost		750	600
Interest cost		3,093	3,884
Net actuarial loss (gain)		(9,127)
Benefits paid from the trust		(100,475)
Benefit obligation at end of year			105,759
Change in plan assets at fair value:
Fair value of plan assets at beginning of year		93,991
Actual return on plan assets	341	(2,375)
Employer contributions	(341)
Employer contributions		8,859
Benefits paid from the trust		(100,475)
Fair value of plan assets at end of year			$ 93,991
Amounts recognized in the Consolidated Balance Sheet consist of:
Accumulated other comprehensive loss