Stockholders' Equity (Tables)

12 Months Ended

Jan. 01, 2012

Stockholders' Equity [Abstract]

Common stock share activity

Balance, December 28, 2008	35,926,224
Stock options exercised and other	152,253
Balance, January 3, 2010	36,078,477
Stock options exercised and other	284,895
Balance, January 2, 2011	36,363,372
Stock options exercised and other	663,643
Balance, January 1, 2012	37,027,015

Valuation of stock options granted

For the year	2011			2010			2009
Expected dividend yield		—			—			—
Expected volatility		36.8	%		35.3	%		38.8	%
Risk-free interest rate		2.1	%		2.4	%		2.1	%
Expected lives		6.2			6.0			5.6

Stock option transactions for employee stock option plans

	2011					2010					2009
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Beginning balance		2,456,296		$	33.07		2,249,050		$	30.40		2,339,970		$	30.39
Granted		499,038		$	47.35		433,094		$	42.09		—		$	—
Exercised		(576,575	)	$	23.89		(179,747	)	$	20.34		(76,517	)	$	12.83
Canceled or expired		(55,914	)	$	42.94		(46,101	)	$	36.74		(14,403	)	$	28.04
Ending balance		2,322,845		$	38.19		2,456,296		$	33.07		2,249,050		$	30.40
Options exercisable at year-end		1,586,480		$	34.79		1,939,785		$	30.19		1,879,554		$	27.29

Stock options outstanding and stock options exercisable under employee stock option plans

	Stock Options Outstanding						Stock Options Exercisable
Range of Exercise Prices	Shares		Weighted Average Exercise Price		Remaining Life		Shares		Weighted Average Exercise       Price
$13.45-$20.00		285,384	$	16.74		1.6		285,384	$	16.74
$20.01-$30.00		217,893	$	26.99		3.2		217,893	$	26.99
$30.01-$40.00		651,919	$	36.36		4.7		651,919	$	36.36
$40.01-$50.00		813,239	$	44.64		8.7		126,224	$	42.14
$50.01-$59.05		354,410	$	50.92		6.5		305,060	$	50.86
		2,322,845	$	38.19		5.9		1,586,480	$	34.79

Stock option transactions for non-employee stock option plans

	2011					2010					2009
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Beginning balance		440,825		$	28.15		418,817		$	26.66		392,002		$	25.53
Granted		42,759		$	45.19		41,364		$	39.53		42,483		$	30.66
Exercised		(78,892	)	$	13.31		(17,356	)	$	14.55		(15,668	)	$	9.26
Canceled or expired		—		$	—		(2,000	)	$	14.75		—		$	—
Ending balance		404,692		$	32.85		440,825		$	28.15		418,817		$	26.66
Options exercisable at year-end		361,933		$	31.39		399,461		$	27.06		378,974		$	26.24

Stock options outstanding and stock exercisable under the non-employee director stock option plan

	Stock Options Outstanding						Stock Options Exercisable
Range of Exercise Prices	Shares		Weighted Average Exercise Price		Remaining Life		Shares		Weighted Average Exercise Price
$8.37-$10.00		14,155	$	9.32		1.3		14,155	$	9.32
$10.01-$20.00		82,424	$	16.39		2.0		82,424	$	16.39
$20.01-$30.00		85,315	$	26.37		4.5		81,102	$	26.19
$30.01-$40.00		84,798	$	34.36		5.5		78,252	$	34.40
$40.01-$50.00		102,000	$	46.18		7.6		70,000	$	44.66
$50.01-$53.76		36,000	$	53.76		6.4		36,000	$	53.76
		404,692	$	32.85		5.0		361,933	$	31.39

Restricted stock

	Shares			Weighted average fair value per share
Balance, December 28, 2008		100,948		$	28.04
Granted		39,204		$	30.97
Issued		(37,100	)	$	21.24
Forfeited/Canceled		(1,712	)	$	21.24
Balance, January 3, 2010		101,340		$	31.77
Granted		41,885		$	29.62
Issued		(31,307	)	$	27.71
Forfeited/Canceled		(2,916	)	$	27.71
Balance, January 2, 2011		109,002		$	32.22
Granted		43,654		$	37.22
Issued		(27,913	)	$	37.89
Forfeited/Canceled		(7,311	)	$	30.77
Balance, January 1, 2012		117,432		$	32.82