Identified Intangible Assets and Goodwill, Net (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	$ 29,121	$ 29,118
Accumulated amortization	24,786	24,311
Identified intangible assets, net	4,335	4,807
Goodwill	29,507	29,474
Identified intangible assets and goodwill, net	33,842	34,281
Customer lists/relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	16,806	16,805
Accumulated amortization	14,060	13,764
Employment-related [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	6,812	6,811
Accumulated amortization	6,088	6,008
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Identified intangible assets, gross	5,503	5,502
Accumulated amortization	$ 4,638	$ 4,539