Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Dec. 31, 2010	Oct. 03, 2010	Jul. 04, 2010	Apr. 04, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jan. 25, 2012
Capital Stock [Abstract]
Common stock, shares authorized (in shares)	100,000,000								100,000,000
Common stock, par value (in dollars per share)	$ 0.10								$ 0.10
Common stock, shares outstanding (in shares)	17,654,965				18,298,551				17,654,965	18,298,551
Preferred stock, authorized (in shares)	1,000,000								1,000,000
Preferred stock, issued (in shares)	0								0
Preferred stock, outstanding (in shares)	0								0
Cash Dividends [Abstract]
Cash dividends paid									$ 3.6
Cash dividends paid (in dollars per share)	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.20
Cash dividend declared												$ 0.8
Cash dividend declared (in dollars per share)												$ 0.05
Stock Award and Incentive Plan [Abstract]
Maximum term of stock options granted under the plan (in years)									10
Vesting period, generally, for stock options granted under the plan (in years)									3
Shares available for grant [Roll Forward]
Balance, beginning of year (in shares)				949,289				1,034,125	949,289	1,034,125	435,850
Granted (in shares)									(190,812)	(219,460)	(280,600)
Authorized (in shares)											800,000
Canceled (in shares)									80,392	134,624	78,875
Balance, end of year (in shares)	838,869				949,289				838,869	949,289	1,034,125
Stock Options [Member]
Stock options [Roll Forward]
Balance, beginning of year (in shares)				820,030				787,530	820,030	787,530	661,781
Granted (in shares)									122,323	141,140	179,200
Exercised (in shares)									(120,598)	(31,697)	(7,532)
Canceled (in shares)									(34,768)	(76,943)	(45,919)
Balance, end of year (in shares)	786,987				820,030				786,987	820,030	787,530
Weighted average exercise price per share, Stock options [Abstract]
Balance, beginning of year (in dollars per share)				$ 52.11					$ 52.11
Granted (in dollars per share)	$ 64.12								$ 64.12
Exercised (in dollars per share)	$ 50.02								$ 50.02
Canceled (in dollars per share)									$ 53.59
Balance, end of year (in dollars per share)	$ 54.19				$ 52.11				$ 54.19	52.11
Restricted Stock [Roll Forward]
Balance, beginning of year (in shares)				820,030					820,030
Granted (in shares)									122,323
Vested (in shares)									(120,598)
Canceled (in shares)									(34,768)
Balance, end of year (in shares)	786,987				820,030				786,987	820,030
Weighted average grant date fair value per share, Restricted stock [Abstract]
Balance, beginning of year (in dollars per share)				$ 52.11				$ 52.54	$ 52.11	52.54	55.14
Granted (in dollars per share)									$ 64.12	49.12	39.84
Vested (in dollars per share)									$ 50.02	44.88	35.63
Canceled (in dollars per share)	$ 53.59				$ 54.42				$ 53.59	54.42	43.14
Balance, end of year (in dollars per share)	$ 54.19				$ 52.11				$ 54.19	52.11	52.54
Restricted Stock [Member]
Stock options [Roll Forward]
Balance, beginning of year (in shares)				150,270				188,718	150,270	188,718	161,294
Granted (in shares)									68,489	78,320	101,400
Exercised (in shares)									(47,123)	(59,087)	(41,020)
Canceled (in shares)									(45,624)	(57,681)	(32,956)
Balance, end of year (in shares)	126,012				150,270				126,012	150,270	188,718
Weighted average exercise price per share, Stock options [Abstract]
Balance, beginning of year (in dollars per share)				$ 47.19				$ 50.16	$ 47.19	50.16	61.63
Granted (in dollars per share)	$ 64.17				$ 49.13				$ 64.17	49.13	39.65
Exercised (in dollars per share)	$ 63.98				$ 54.43				$ 63.98	54.43	60.35
Canceled (in dollars per share)									$ 60.44	52.12	61.30
Balance, end of year (in dollars per share)	$ 54.42				$ 47.19				$ 54.42	47.19	50.16