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Shareholders' Equity and Debt (Debt) (Details) (Line of Credit, Revolving Credit Facility, USD $)
0 Months Ended 6 Months Ended
Jun. 26, 2014
SunTrust Bank
Jun. 26, 2014
SunTrust Bank
Jun. 30, 2014
Credit Facility, Fifth Amended and Restated Loan Agreement, the Agreement, August 2011
Dec. 31, 2013
Credit Facility, Fifth Amended and Restated Loan Agreement, the Agreement, August 2011
Aug. 31, 2011
Credit Facility, Fifth Amended and Restated Loan Agreement, the Agreement, August 2011
Line of Credit Facility [Line Items]          
Expiration period 3 years        
Line of credit, maximum borrowing capacity   $ 12,000,000     $ 10,000,000
Line of credit, maximum borrowing capacity upon satisfaction of certain conditions   $ 20,000,000      
Interest rate spread, minimum 1.00%        
Interest rate spread, maximum 2.85%        
Interest rate of line of credit       2.17%  
Line of credit, unused capacity, commitment fee percentage 0.25%   0.25%