Summary of Changes In Stockholders' Equity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Stockholders' Equity [Line Items]
Beginning Balance	$ 143,274
Net income	33,257	32,304
Other comprehensive income	(354)	437
Stock-based compensation costs	1,766
Tax shortfall from restricted stock, net	(492)
Restricted stock returned for taxes, shares	(312,309)
Restricted stock returned for taxes	(2,136)
Repurchase of treasury shares	(9,970)
Dividends declared	(4,269)
Ending Balance	161,076
Common Stock
Stockholders' Equity [Line Items]
Beginning Balance (in shares)	61,696,806
Beginning Balance	6,170
Restricted stock issued, net of forfeitures (in shares)	279,735
Restricted stock issued, net of forfeitures	28
Restricted stock returned for taxes, shares	(70,117)
Restricted stock returned for taxes	(7)
Ending Balance (in shares)	61,906,424
Ending Balance	6,191
Capital In Excess of Par Value
Stockholders' Equity [Line Items]
Beginning Balance	447,449
Stock-based compensation costs	1,766
Restricted stock issued, net of forfeitures	(28)
Tax shortfall from restricted stock, net	(492)
Restricted stock returned for taxes	(2,129)
Ending Balance	446,566
Retained Earnings
Stockholders' Equity [Line Items]
Beginning Balance	823,012
Net income	33,257
Dividends declared	(4,269)
Ending Balance	852,000
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity [Line Items]
Beginning Balance	5,880
Other comprehensive income	(354)
Ending Balance	5,526
Treasury Stock
Stockholders' Equity [Line Items]
Beginning Balance (in shares)	43,814,979
Beginning Balance	(1,139,237)
Repurchase of treasury shares (in shares)	312,309
Repurchase of treasury shares	(9,970)
Ending Balance (in shares)	44,127,288
Ending Balance	$ (1,149,207)