Nature of Operations and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	$ 109,843	$ 85,152
Currency translation	(8,073)	(6,212)
Accumulated Amortization	(49,040)	(40,908)
Net	52,730	38,032
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	59,101	43,271
Currency translation	(5,202)	(3,916)
Accumulated Amortization	(21,805)	(17,314)
Net	32,094	22,041
Intellectual property
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	27,101	22,899
Currency translation	(2,052)	(1,772)
Accumulated Amortization	(17,105)	(15,584)
Net	7,944	5,543
Tradenames
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	12,547	10,269
Currency translation	(591)	(405)
Accumulated Amortization	(1,065)	(698)
Net	10,891	9,166
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	3,662	3,548
Currency translation	(85)	(55)
Accumulated Amortization	(3,373)	(3,298)
Net	204	195
Distribution network
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	2,400	2,400
Currency translation	0	0
Accumulated Amortization	(1,642)	(1,501)
Net	758	899
Licensing agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	400	400
Currency translation	0	0
Accumulated Amortization	(233)	(213)
Net	167	187
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	4,632	2,365
Currency translation	(143)	(64)
Accumulated Amortization	(3,817)	(2,300)
Net	$ 672	$ 1