Stock Based Compensation and Stock Options (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans that have shares reserved for further issuance	2
Shares of common stock reserved under all option plans for future issuance (in shares)	521,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of fair market value of stock on grant date for exercise price, minimum (in hundredths)	100.00%
Options granted (in shares)	0	0
Stock Option Activity [Roll Forward]
Outstanding at beginning of period (in shares)	25,500	80,000	80,000
Exercised (in shares)	(4,500)		(54,500)
Outstanding at end of period (in shares)	21,000		25,500
Weighted - Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)	13.580	12.471	12.471
Exercised (in dollars per share)	13.580		11.952
Outstanding at end of period (in dollars per share)	13.580		13.580
Options Outstanding and Exercisable [Abstract]
Outstanding as of June 30, 2012 (in shares)	21,000
Weighted - Average Remaining Contractual Life	2 years 6 months
Weighted- Average Exercise Price (in dollars per share)	$ 13.580
Options outstanding and exercisable, intrinsic value	$ 53,970
Total intrinsic value of stock options exercised	14,535
Recognized tax benefits from the disqualification of incentive stock options	$ 0	$ 16,453
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	0	0
1995 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant (in shares)	0
2010 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant (in shares)	500,000