Stock Options And Employee Stock Purchase Plan (Tables)

3 Months Ended

Mar. 31, 2013

Stock Options Activity

The following table represents stock option activity for the three months ended March 31, 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	(95,600	)	21.18
Canceled	(12,000	)	25.09
Outstanding at March 31, 2013	1,657,861		22.11		4.8	$	28,342,082
Exercisable at March 31, 2013	1,171,505		21.58		3.9	$	20,651,647
Vested and expected to vest at March 31, 2013	1,580,207		$	21.98	4.7	$	27,221,158

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 three month period ended March 31, 2013:

	Three Months Ended March 31,
	2012
Risk-free interest rate	1.27%
Expected term (in years)	5.8
Dividend yield	2.84%
Expected volatility	42%
Weighted-average volatility	42%

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 three months ended March 31, 2013 and 2012 (in thousands):

	Three Months Ended March 31,
	2013		2012
Cost of revenues	$	214	$	242
Operating expenses:
Sales and marketing	418		375
Research, development and engineering	106		116
General and administrative	1,610		1,560
Total	$	2,348	$	2,293

Restricted Stock [Member]

Restricted Stock And Restricted Stock Unit Award Activity

Restricted stock award activity for the three months ended March 31, 2013 is set forth below:

	Shares		Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2013	828,475		$	23.08
Granted	—		—
Vested	(153,325	)	17.75
Canceled	(12,000	)	25.09
Nonvested at March 31, 2013	663,150		$	24.28

Restricted Stock Units (RSUs) [Member]

Restricted Stock And Restricted Stock Unit Award Activity

Restricted stock unit award activity for the three months ended March 31, 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	—
Vested	(4,050	)
Canceled	—
Outstanding at March 31, 2013	111,416		2.5	$	4,368,621
Vested and expected to vest at March 31, 2013	75,627		2.2	$	2,965,350