Common Stock and Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2012

Common Stock and Stock-Based Compensation Plans [Abstract]

Summary of stock option and SARs activity and related information

	Number of options and SAR units			Weighted average exercise price		Weighted average remaining contractual term		Aggregate intrinsic- value
Outstanding as of June 30, 2012		2,018,796		$	15.93
SAR units granted (1)		537,000			15.54
Options exercised		(3,908	)		7.97
Options/SAR units forfeited or expired		(5,282	)		20.96
Outstanding as of September 30, 2012 (2)		2,546,606		$	15.85		5.1	$	—
Exercisable as of September 30, 2012		1,202,457		$	12.32		3.5	$	2,471,668

(1) The SAR units are convertible for a maximum number of shares of the Company’s common stock equal to 75% of the SAR units subject to the grant.

(2) Due to the ceiling imposed on the SAR grants, the outstanding amount equals to a maximum of approximately 2,412,606 shares of the Company’s common stock issuable upon exercise.

Equity-based compensation expense included in interim condensed consolidated statements of comprehensive income

	Nine months ended September 30,				Three months ended September 30,
	2012		2011		2012		2011
	(unaudited)		(unaudited)		(unaudited)		(unaudited)
Cost of revenue	$	177	$	171	$	73	$	61
Research and development, net		1,327		1,372		468		510
Sales and marketing		723		747		284		291
General and administrative		1,461		1,250		541		553
Total equity-based compensation expense	$	3,688	$	3,540	$	1,366	$	1,415

Assumptions used to estimate stock options and SARs granted to employees

	Three months ended September 30,
	2012			2011
	(unaudited)			(unaudited)
Expected dividend yield		0	%		0	%
Expected volatility		47%-55	%		41%-55	%
Risk-free interest rate		0.2%-1.0	%		0.2%-2.3	%
Expected forfeiture (employees)		10	%		10	%
Expected forfeiture (executives)		5	%		—
Contractual term of up to		7 Years			7 Years
Suboptimal exercise multiple (employees)		2.1			2.0
Suboptimal exercise multiple (executives)		2.4			—