Shareholders' Equity (Tables)

6 Months Ended

Jul. 01, 2011

Shareholders' Equity

Employee Stock-Based Compensation Expense Included in the Consolidated Statements of Income

	Three Months Ended						Six Months Ended
	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
(Dollars in thousands)
Cost of sales	$	502		$	486		$	970		$	987
Research and development		1,126			984			2,222			1,931
Sales and marketing		1,659			1,347			3,293			2,730
General and administrative		3,842			2,167			7,442			4,977
Total operating expenses		6,627			4,498			12,957			9,638
Total stock-based compensation expense		7,129			4,984			13,927			10,625
Tax benefit (1)		(2,139	)		(1,419	)		(4,342	)		(2,195	)
Total stock-based compensation expense, net of tax	$	4,990		$	3,565		$	9,585		$	8,430

Weighted Average Assumptions Used in Stock Options Granted

	Three Months Ended						Six Months Ended
	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
Expected dividend yield		0			0			0			0
Expected stock price volatility		43.7	%		43.7	%		43.6	%		43.8	%
Risk free interest rate		1.6	%		1.8	%		1.6	%		1.8	%
Expected life of option		4.2 years			4.2 years			4.2 years			4.2 years