Stock Options And Employee Stock Purchase Plan (Tables)

6 Months Ended

Jun. 30, 2012

Stock Options Activity

The following table represents stock option activity for the six months ended June 30, 2012:

	Number of Shares		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at January 1, 2012	2,087,695		$	20.99
Granted	57,000		27.04
Exercised	(225,410	)	13.27
Canceled	(16,000	)	33.54
Outstanding at June 30, 2012	1,903,285		21.98		5.6	$	11,001,387
Exercisable at June 30, 2012	1,212,489		21.45		4.5	$	7,867,462
Vested and expected to vest at June 30, 2012	1,803,435		$	21.82	5.4	$	10,701,380

Assumptions To Estimate Fair Value Of Stock Options

The weighted-average fair values of stock options granted have been estimated utilizing the following assumptions:

	Six Months Ended June 30,
	2012	2011
Risk-free interest rate	0.97%	2.39%
Expected term (in years)	5.7	6.5
Dividend yield	3.43%	—%
Expected volatility	41%	42%
Weighted-average volatility	41%	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 and six months ended June 30, 2012 and 2011 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Cost of revenues	$	192	$	246	$	434	$	490
Operating expenses:
Sales and marketing	352		351		727		699
Research, development and engineering	117		110		233		257
General and administrative	1,494		1,524		3,054		2,990
Total	$	2,155	$	2,231	$	4,448	$	4,436

Restricted Stock [Member]

Restricted Stock And Restricted Stock Unit Award Activity

Restricted stock award activity for the six months ended June 30, 2012 is set forth below:

	Shares		Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2012	742,683		$	20.87
Granted	88,544		25.47
Vested	(184,652	)	20.37
Canceled	(900	)	29.21
Nonvested at June 30, 2012	645,675		$	21.63

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, 2012 is set forth below:

	Number of Shares		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at January 1, 2012	32,750
Granted	64,166
Vested	(1,500	)
Canceled	—
Outstanding at June 30, 2012	95,416		3.0	$	2,520,891
Vested and expected to vest at June 30, 2012	60,453		3.0	$	1,597,179