Repurchase of Common Stock (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Repurchase of Common Stock [Abstract]
Remaining Authorized Amount, Stock Repurchase Program			$ 156,700,000
Amount repurchased under Board approved share repurchase program	10,009,000	10,007,000	20,018,000	10,007,000
Amount repurchased in connection with the vesting of employee restricted stock grants	1,878,000	2,801,000	2,013,000	4,016,000
Total amount repurchased	$ 11,887,000	$ 12,808,000	$ 22,031,000	$ 14,023,000