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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Activity for RSUs

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

		Year Ended December 31,
		2015
		Non-vested RSUs				Weighted Average Grant Date Fair Value
Non-vested RSUs — beginning of period			716,714			$	28.67
Granted			394,952			$	32.89
Vested			(351,601	)		$	28.59
Forfeited or expired			(26,903	)		$	29.84
Non-vested RSUs — end of period			733,162			$	30.94

Summary of Activity for Options

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

		Year Ended December  31,
		2015
		Options				Weighted Average Exercise Price
Outstanding — beginning of period			30,224			$	19.67
Exercised			(30,100	)		$	19.68
Forfeited or expired			(124	)		$	18.16
Outstanding — end of period			—			$	—
Exercisable at end of period			—			$	—

Effect of Recording Stock-Based Compensation

The following table reflects the effect of recording stock-based compensation for the years 2015, 2014 and 2013:

		Years Ended December 31,
Stock-based compensation expense by type of award:		2015				2014				2013
Restricted stock units		$	11,885			$	10,203			$	12,982
Employee stock purchase plan			1,128				1,112				1,010
Total stock-based compensation			13,013				11,315				13,992
Tax effect on stock-based compensation			(836	)			(331	)			(495	)
Net effect on net income		$	12,177			$	10,984			$	13,497
Effect on net earnings per share:
Basic		$	0.23			$	0.21			$	0.25
Diluted		$	0.23			$	0.21			$	0.25

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 2015, 2014 and 2013 was as follows:

		Years Ended December 31,
		2015				2014				2013
Cost of revenues		$	1,814			$	1,960			$	2,038
Research and development expense			1,590				1,659				1,902
Selling, general and administrative expense			9,609				7,696				10,052
Total pre-tax stock-based compensation expense		$	13,013			$	11,315			$	13,992

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

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

		Years Ended December 31,
Employee stock purchase plan rights:		2015				2014				2013
Expected life (years)			0.5				0.5				0.5
Risk-free interest rate			0.1	%			0.1	%			0.1	%
Expected volatility			26.4	%			26.4	%			27.7	%
Expected annual dividends per share		$	0.675			$	0.655			$	0.64

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Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
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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 changes in outstanding nonvested restricted stock units.

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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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