Shareholders' Equity (Tables)

3 Months Ended

Mar. 30, 2012

Shareholders' Equity [Abstract]

Summary Of Stock-Based Compensation Expense, Net Of Tax

	First Quarter of
	2012			2011
(Dollars in thousands)
Cost of sales	$	520		$	468
Research and development		1,229			1,096
Sales and marketing		1,791			1,634
General and administrative		4,249			3,600
Total operating expenses		7,269			6,330
Total stock-based compensation expense		7,789			6,798
Tax benefit (1)		(2,473	)		(2,203	)
Total stock-based compensation expense, net of tax	$	5,316		$	4,595

(1) Tax benefit related to U.S. incentive and non-qualified stock options, restricted stock units and ESPP, applying a Federal statutory and State (Federal effected) tax rate for the respective periods.

Schedule Of Weighted Average Assumptions Used In Stock Options Granted

	First Quarter of
	2012			2011
Expected dividend yield		—			—
Expected stock price volatility		45.4	%		41.9	%
Risk free interest rate		0.8	%		1.0	%
Expected life of option		4.1 years			4.2 years