Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013		Sep. 29, 2012
Number of stock plans approved by shareholders			3
Total stock-based compensation expense(1)	$ 1,066,000	$ 1,201,000	$ 3,058,000	[1]	$ 9,570,000	[1]
Income tax benefit	(366,000)	(413,000)	(1,049,000)		(3,292,000)
Total stock-based compensation expense, net of tax	700,000	788,000	2,009,000		6,278,000
CEO Transition Costs	(143,000)	0	(534,000)		5,595,000
CEO Transition Costs, Net of Tax	(100,000)		(400,000)		3,700,000
Stock Options [Member]
Total stock-based compensation expense(1)	740,000	543,000	2,018,000		3,161,000
Time-Based Stock Awards And Performance Stock Awards [Member]
Total stock-based compensation expense(1)	$ 326,000	$ 658,000	$ 1,040,000		$ 6,409,000

[1] Includes $(0.5) million and $5.6 million of CEO transition (benefit) costs for the nine months ended September 28, 2013 and September 29, 2012, respectively. There was no CEO transition benefit or costs for the three months ended September 29, 2012. See below for additional details regarding CEO Transition Costs.