Identified Intangible Assets and Goodwill, Net (Details) - USD ($) $ in Thousands	Oct. 03, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	$ 30,156	$ 28,388
Accumulated amortization	24,001	22,489
Identified intangible assets, net	6,155	5,899
Goodwill	29,139	28,164
Identified intangible assets and goodwill, net	35,294	34,063
Customer lists/relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	17,220	16,076
Accumulated amortization	13,471	12,560
Employment-related [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	7,401	7,026
Accumulated amortization	6,091	5,776
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	5,535	5,286
Accumulated amortization	$ 4,439	$ 4,153