Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Assumptions and Weighted Average Fair Values

The fair value of all option grants was estimated using the Black-Scholes option pricing model with the following assumptions and weighted-average fair values as follows:

	Year Ended December  31, 2010
Weighted average fair value of grants	$	6.78
Valuation assumptions:
Expected dividend yield		0.00	%
Expected volatility		68.44
Expected life (in years)		4.44
Risk-free interest rate		1.71	%

Option Activity Under the Principal Option Plans

Option activity under the principal option plans as of December 31, 2012 and changes during the year then ended were as follows:

	Shares			Weighted-Average		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(in thousands)			Exercise Price		(in years)		(in thousands)
Outstanding as of December 31, 2010		253		$	11.34		4.93	$	1,554
Granted		—			—
Exercised		(82	)		9.95
Forfeited		(5	)		12.80
Expired		(18	)		10.33
Outstanding as of December 31, 2011		148		$	12.17		4.95	$	608
Granted		—			—
Exercised		(13	)		6.00
Forfeited		—			—
Expired		—			—
Outstanding as of December 31, 2012		135		$	12.79		4.33	$	670
Exercisable as of December 31, 2012		87		$	12.90		4.19	$	422