Stockholders' Equity - Summary of Changes In Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Value, Issued beginning balance			$ 6,170
Capital in excess of par value beginning balance			447,449
Retained earnings beginning balance			823,012
Accumulated other comprehensive income beginning balance	5,284		5,284
Treasury stock, value beginning balance			(1,139,237)
Beginning Balance			143,274
Net income	7,439	7,794	47,935	44,177
Other comprehensive income	225	767	(596)	712
Stock-based compensation costs			6,603
Tax shortfall from restricted stock, net			(272)
Restricted stock returned for taxes			(2,191)
Repurchase of treasury shares (in shares)			526,245
Repurchase of treasury shares			(18,112)
Dividends declared			(12,694)	(11,900)
Common Stock, Value, Issued ending balance	6,189		6,189
Capital in excess of par value ending balance	451,570		451,570
Retained earnings ending balance	858,253		858,253
Accumulated other comprehensive income ending balance			5,880
Treasury stock, value ending balance	(1,157,349)		(1,157,349)
Ending Balance	163,947		163,947
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)			61,696,806
Common Stock, Value, Issued beginning balance			6,170
Restricted stock issued, net of forfeitures (in shares)			267,152
Restricted stock issued, net of forfeitures			27
Restricted stock returned for taxes (in shares)			(71,465)
Restricted stock returned for taxes			(8)
Ending Balance (in shares)	61,892,493		61,892,493
Common Stock, Value, Issued ending balance	6,189		6,189
Capital In Excess of Par Value
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital in excess of par value beginning balance			447,449
Stock-based compensation costs			6,603
Restricted stock issued, net of forfeitures			(27)
Tax shortfall from restricted stock, net			(272)
Restricted stock returned for taxes			(2,183)
Capital in excess of par value ending balance	451,570		451,570
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings beginning balance			823,012
Net income			47,935
Dividends declared			(12,694)
Retained earnings ending balance	858,253		858,253
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income beginning balance	5,284		5,284
Other comprehensive income			(596)
Accumulated other comprehensive income ending balance			5,880
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)			43,814,979
Treasury stock, value beginning balance			(1,139,237)
Repurchase of treasury shares (in shares)			526,245
Repurchase of treasury shares			(18,112)
Ending Balance (in shares)	44,341,224		44,341,224
Treasury stock, value ending balance	$ (1,157,349)		$ (1,157,349)