Long-Term Debt and Credit Arrangements (Note Payable - Robertex Acquisition) (Details) - Long-term Debt, Type [Domain] $ in Thousands	6 Months Ended
	Jun. 27, 2015 USD ($) yr	Dec. 27, 2014 USD ($)	Jul. 01, 2013 USD ($) Rate
Debt Instrument [Line Items]
Acquisition note payable - Robertex	$ 3,095	$ 3,062
Note Payable - Robertex Acquisition [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage | Rate			4.50%
Acquisition note payable - Robertex	$ 3,749		$ 4,000
Term of Note Payable | yr	5
Debt Instrument, Annual Principal Payment	$ 800