Pension and Other Post-Retirement Benefits (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jul. 02, 2012	Jul. 02, 2011	Jul. 02, 2010
Pension and Other Postretirement Benefit Expense	$ 418,000	$ 284,000	$ 156,000
Plan participant contributions	373,000	370,000	157,000
Defined Benefit Plan, Funded Percentage				97.12%	81.56%	85.25%
Defined Contribution Plan, Employer Matching Contribution, Percent	75.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	6.00%
Defined Benefit Plan Vesting Schedule	6 years
Defined Contribution Plan, Employer Discretionary Contribution Amount	243,000	224,000	204,000
Non Directors Defined Benefit Plan Description	100.00%
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 34,000
Healthcare Benefits Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.91%	5.00%	5.75%