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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Stock-Based Compensation [Abstract]

Schedule of Stock-Based Compensation Expense

The consolidated statements of operations for the years ended December 31, 2013, 2012 and 2011 include the following stock-based compensation expense related to stock option awards, restricted stock, restricted stock unit awards and the employee stock purchase plan (in thousands):

			2013			2012			2011
Cost of sales			$	2,523		$	2,694		$	2,566
Selling and administrative expenses				25,252			22,679			21,891
Research and development expenses				3,933			3,810			3,122
	Total stock-based compensation		$	31,708		$	29,183		$	27,579

Relevant Data Used to Determine the Value of Stock Options Granted During the Period

The relevant data used to determine the value of the stock options granted during 2013, 2012 and 2011 are as follows:

Options Issued and Significant Assumptions Used to Estimate Option Fair Values		2013		2012		2011
Options issued in thousands		428		699		658
Risk-free interest rate		1.7%		1.0%		1.1%
Expected life in years		5		6		6
Expected volatility		0.248		0.265		0.376
Expected dividends		-		-		-

Weighted-Average Exercise Price and Fair Value of Options on the Date of Grant		2013			2012			2011
Exercise price		$	97.74		$	86.55		$	79.10
Fair value		$	27.37		$	23.97		$	29.67

Stock Options Outstanding Roll Forward

The following table summarizes stock option activity for the plans for the year ended December 31, 2013 (in thousands, except per share data):

				Number of Shares		Exercise Price per Share						Weighted-Average Exercise Price
Outstanding at December 31, 2012				4,809		$	23.19	to	$	87.06		$	63.34
	Granted			428		$	88.71	to	$	103.47		$	97.74
	Exercised			(1,281)		$	23.19	to	$	79.15		$	50.89
	Canceled			(39)		$	36.25	to	$	79.15		$	72.42
Outstanding at December 31, 2013				3,917		$	33.12	to	$	103.47		$	71.08

Stock Options Outstanding by Exercise Price Range

The following table details the weighted-average remaining contractual life of options outstanding at December 31, 2013 by range of exercise prices (in thousands, except per share data):

											Remaining
						Number			Weighted-		Contractual		Number			Weighted-
						of Shares			Average		Life of Options		of Shares			Average
Exercise Price Range						Outstanding			Exercise Price		Outstanding		Exercisable			Exercise Price
$	33.12	to	$	48.99		901		$	43.85		2.4		898		$	43.88
$	49.00	to	$	78.99		840		$	64.59		5.0		707		$	64.68
$	79.00	to	$	103.47		2,176		$	84.86		8.4		637		$	80.63
		Total				3,917		$	71.08		6.3		2,242		$	60.88

Restricted Stock Units Unvested Roll Forward

The following table summarizes the unvested restricted stock unit award activity for the year ended December 31, 2013 (in thousands, except for per share amounts):

			Shares		Weighted-Average Price
Unvested at December 31, 2012			574		$	67.28
	Granted		303		$	94.74
	Vested		(207)		$	60.65
	Forfeited		(28)		$	72.27
Unvested at December 31, 2013			642		$	82.16

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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