Employee Benefit Plans - Changes in Plans and AOCI Impacts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Pension benefits | U.S. Pension Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 31,310	$ 32,213
Acquisition	0	0
Service cost	723	842	$ 850
Interest cost	1,273	1,229	1,286
Actuarial loss (gain)	575	(1,448)
Benefits paid	(1,946)	(1,526)
Settlement payment	0	0
Currency translation	0	0
Benefit obligation at end of year	31,935	31,310	32,213
Change in Plan Assets:
Fair value of plan assets at beginning of year	27,776	28,986
Actual return on plan assets	2,075	(764)
Employer contributions	1,080	1,080
Benefits paid	(1,946)	(1,526)
Settlement payment	0	0
Currency translation	0	0
Fair value of plan assets at end of year	28,985	27,776	28,986
Unfunded Status	(2,950)	(3,534)
Accumulated Benefit Obligation at End of Year	27,573	26,844
Current liability	0	0
Non-current liability	(2,950)	(3,534)
Unrecognized net actuarial loss	(7,383)	(8,094)
Unrecognized prior service cost	(53)	(108)
Total	(7,436)	(8,202)
Current year unrecognized net actuarial gain (loss)	213	(737)
Amortization of unrecognized prior service cost	55	55
Amortization of unrecognized net actuarial loss	498	508
Settlement loss	0	0
Currency translation	0	0
Total	766	(174)
Pension benefits | Non-U.S. Pension Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year	3,041	3,531
Acquisition	380	0
Service cost	102	105	193
Interest cost	107	102	138
Actuarial loss (gain)	58	(102)
Benefits paid	(63)	(189)
Settlement payment	0	0
Currency translation	(284)	(406)
Benefit obligation at end of year	3,341	3,041	3,531
Change in Plan Assets:
Fair value of plan assets at beginning of year	396	632
Actual return on plan assets	6	(142)
Employer contributions	159	189
Benefits paid	(63)	(189)
Settlement payment	0	0
Currency translation	(72)	(94)
Fair value of plan assets at end of year	426	396	632
Unfunded Status	(2,915)	(2,645)
Accumulated Benefit Obligation at End of Year	2,549	2,169
Current liability	(194)	(133)
Non-current liability	(2,721)	(2,512)
Unrecognized net actuarial loss	(784)	(832)
Unrecognized prior service cost	(42)	(47)
Total	(826)	(879)
Current year unrecognized net actuarial gain (loss)	(75)	(75)
Amortization of unrecognized prior service cost	4	4
Amortization of unrecognized net actuarial loss	39	38
Settlement loss	0	0
Currency translation	85	109
Total	53	76
Other Post-Retirement Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year	3,539	3,823
Acquisition	0	0
Service cost	130	117	103
Interest cost	156	147	163
Actuarial loss (gain)	686	(299)
Benefits paid	(180)	(219)
Settlement payment	(415)	0
Currency translation	(22)	(30)
Benefit obligation at end of year	3,894	3,539	3,823
Change in Plan Assets:
Fair value of plan assets at beginning of year	26	34
Actual return on plan assets	1	(3)
Employer contributions	601	219
Benefits paid	(180)	(219)
Settlement payment	(415)	0
Currency translation	(5)	(5)
Fair value of plan assets at end of year	28	26	$ 34
Unfunded Status	(3,866)	(3,513)
Accumulated Benefit Obligation at End of Year	0	0
Current liability	(183)	(187)
Non-current liability	(3,683)	(2,911)
Unrecognized net actuarial loss	(872)	(325)
Unrecognized prior service cost	(525)	(610)
Total	(1,397)	(935)
Current year unrecognized net actuarial gain (loss)	(685)	237
Amortization of unrecognized prior service cost	88	88
Amortization of unrecognized net actuarial loss	50	30
Settlement loss	114	0
Currency translation	(29)	35
Total	$ (462)	$ 390