Stock Options And Employee Stock Purchase Plan (Tables)

6 Months Ended

Jun. 30, 2013

Stock Options Activity

The following table represents stock option activity for the six months ended June 30, 2013:

	Number of Shares		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at January 1, 2013	1,765,461		$	22.08
Granted	—		—
Exercised	(268,793	)	24.27
Canceled	(20,600	)	21.79
Outstanding at June 30, 2013	1,476,068		21.69		4.6	$	30,731,407
Exercisable at June 30, 2013	1,126,109		21.16		3.8	$	24,039,530
Vested and expected to vest at June 30, 2013	1,411,380		$	21.53	4.4	$	29,614,301

Assumptions To Estimate Fair Value Of Stock Options

The weighted-average fair values of stock options granted have been estimated utilizing the following assumptions, no stock options were granted during the six month period ended June 30, 2013:

	Six Months Ended June 30,
	2012
Risk-free interest rate	0.97%
Expected term (in years)	5.7
Dividend yield	3.43%
Expected volatility	41%
Weighted-average volatility	41%

Allocation Of Share-Based Compensation Expense

The following table represents share-based compensation expense included in cost of revenues and operating expenses in the accompanying condensed consolidated statements of operations for the six months ended June 30, 2013 and 2012 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Cost of revenues	$	205	$	192	$	419	$	434
Operating expenses:
Sales and marketing	432		352		850		727
Research, development and engineering	102		117		208		233
General and administrative	1,596		1,494		3,206		3,054
Total	$	2,335	$	2,155	$	4,683	$	4,448

Restricted Stock [Member]

Restricted Stock And Restricted Stock Unit Award Activity

Restricted stock award activity for the six months ended June 30, 2013 is set forth below:

	Shares		Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2013	828,475		$	23.08
Granted	170,930		40.08
Vested	(255,541	)	20.33
Canceled	(37,400	)	23.51
Nonvested at June 30, 2013	706,464		$	28.16

Restricted Stock Units (RSUs) [Member]

Restricted Stock And Restricted Stock Unit Award Activity

Restricted stock unit award activity for the six months ended June 30, 2013 is set forth below:

	Number of Shares		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at January 1, 2013	115,466
Granted	6,675
Vested	(8,716	)
Canceled	(33,000	)
Outstanding at June 30, 2013	80,425		2.3	$	3,418,867
Vested and expected to vest at June 30, 2013	54,961		2.1	$	2,336,374