Equity Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of the activity of stock option awards

The Company uses a Black-Scholes option valuation model to estimate the fair value of each option awarded. A summary of the activity of stock option awards issued and outstanding under Company plans is as follows for the three months ended March 31, 2013:

	Shares		Wtd. Avg. Exercise Price		Wtd. Avg. Remaining Contractual Term (years)	Aggregate Intrinsic Value
	(in thousands)					(in thousands)
Options outstanding at December 31, 2012	1,198		$	18.92	6.85	$	11,090
Options granted	—		—
Options exercised	(181	)	16.81
Options forfeited/canceled/expired	(3	)	20.67
Options outstanding at March 31, 2013	1,014		$	19.30	6.95	$	18,567
Options vested and expected to vest at March 31, 2013	977		$	19.22	6.90	$	17,975
Options exercisable at March 31, 2013	637		$	18.27	6.32	$	12,322

Summary of the activity of restricted stock

A summary of the activity of restricted stock outstanding is as follows for the three months ended March 31, 2013:

	Shares		Wtd. Avg. Grant  Date Fair Value
	(in thousands)
Restricted stock outstanding at December 31, 2012	670		$	18.14
Granted	—		—
Vested	(130	)	21.33
Forfeited/canceled	—		—
Restricted stock outstanding at March 31, 2013	540		$	17.37