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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity for RSUs

The following table presents the activity for RSUs under the Plans:

		Years Ended December 31,
		2013								2012								2011
		Non-vested RSUs				Weighted Average Grant Date Fair Value				Non-vested RSUs				Weighted Average Grant Date Fair Value				Non-vested RSUs				Weighted Average Grant Date Fair Value
Non-vested RSUs — beginning of period			942,203			$	26.58				1,115,005			$	21.50				1,327,306			$	18.34
Granted			501,954			$	26.81				426,583			$	29.14				397,492			$	30.27
Vested			(688,376	)		$	25.09				(557,314	)		$	19.01				(569,891	)		$	20.42
Forfeited or expired			(23,747	)		$	27.17				(42,071	)		$	22.36				(39,902	)		$	18.36
Non-vested RSUs — end of period			732,034			$	28.08				942,203			$	26.58				1,115,005			$	21.50

Summary of Activity for Options

The following table presents the activity for options under the Plans:

		Years Ended December 31,
		2013								2012								2011
		Options				Weighted Average Exercise Price				Options				Weighted Average Exercise Price				Options				Weighted Average Exercise Price
Outstanding — beginning of period			255,649			$	21.74				420,712			$	21.97				1,793,214			$	22.38
Exercised			(88,336	)		$	21.15				(123,650	)		$	18.78				(1,351,684	)		$	22.46
Forfeited or expired			(31,580	)		$	27.04				(41,413	)		$	32.32				(20,818	)		$	22.66
Outstanding — end of period			135,733			$	20.88				255,649			$	21.74				420,712			$	21.97
Exercisable at end of period			135,733			$	20.88				255,649			$	21.74				420,712			$	21.97

Summary of Information with Respect to Options Outstanding and Exercisable

The following table summarizes information with respect to options outstanding and exercisable under the Plans at December 31, 2013:

		Options Outstanding and Exercisable
		Number of Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (In Years)				Aggregate  Intrinsic Value (In Thousands)
$14.45 – $29.93			135,733			$	20.88				0.95			$	1,227

Effect of Recording Stock-Based Compensation

The following table reflects the effect of recording stock-based compensation for the years 2013, 2012 and 2011:

		Years Ended December 31,
		2013				2012				2011
Stock-based compensation expense by type of award:
Restricted stock		$	12,982			$	11,836			$	10,126
Employee stock purchase plan			1,010				1,195				1,099
Total stock-based compensation			13,992				13,031				11,225
Tax effect on stock-based compensation			(495	)			(1,862	)			(5,019	)
Net effect on net income		$	13,497			$	11,169			$	6,206
Effect on net earnings per share:
Basic		$	0.25			$	0.21			$	0.12
Diluted		$	0.25			$	0.21			$	0.12

Pre-Tax Effect Within Consolidated Statements of Operations of Recording Stock-Based Compensation

The pre-tax effect within the consolidated statements of operations and comprehensive income of recording stock-based compensation for the years 2013, 2012 and 2011 was as follows:

		Years Ended December 31,
		2013				2012				2011
Cost of sales		$	2,038			$	1,867			$	1,511
Research and development expense			1,902				2,278				2,197
Selling, general and administrative expense			10,052				8,886				7,517
Total pre-tax stock-based compensation expense		$	13,992			$	13,031			$	11,225

Fair Value of Employees' Purchase Rights Estimated using Black-Scholes Option-Pricing Model

The fair value of the employees’ purchase rights was estimated using the Black-Scholes option-pricing model with the following weighted average assumptions:

		Years Ended December 31,
		2013				2012				2011
Employee stock purchase rights:
Expected life (years)			0.5				0.5				0.5
Risk-free interest rate			0.1	%			0.1	%			0.2	%
Expected volatility			27.7	%			32.2	%			31.9	%
Expected annual dividends per share		$	0.64			$	0.62			$	0.60

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