In August 2007, the Company’s Board of Directors (the “Board”) authorized a plan to repurchase the Company’s outstanding shares of common stock dependent on market conditions, share price and other factors. There were no repurchases during the three months ended March 31, 2020. The Company has repurchased a total of approximately 13,279,000 shares of common stock since inception of the plan, at an average price of $26.25 per share for a total cost of $348.6 million. The shares repurchased are recorded as treasury stock and are accounted for under the cost method. No expiration date has been specified for this plan. As of March 31, 2020, the total remaining amount available for repurchase was $101.4 million.

As of March 31, 2020, there were approximately 0.9 million shares reserved for future grant under the Company’s 2003 Equity Incentive Plan (the “2003 Plan”).

A summary of the stock option activity is presented below (in thousands, except per share amounts):

	Options Outstanding
	Number of Shares Subject to Options			Weighted Average Exercise Price Per Share
Balance at December 31, 2019		605		$	26.68
Options granted		—			—
Options exercised		—			—
Options canceled / forfeited / expired		(17	)	$	22.05
Balance at March 31, 2020		588		$	26.77

Information with respect to outstanding restricted stock awards and units as of March 31, 2020 is as follows (in thousands, except per share amounts):

	Restricted Stock and Restricted Stock Units
	Number of Shares Subject to Time- based Vesting			Number of Shares Subject to Performance- based Vesting			Total Number of Shares			Weighted Average Grant Date Fair Value Per Share
Balance at December 31, 2019		2,371			554			2,925		$	25.99
Awards and units granted		1,007			—			1,007		$	10.75
Awards and units vested / earned		(754	)		(104	)		(858	)	$	27.57
Awards and units canceled / forfeited		(11	)		(134	)		(145	)	$	30.26
Balance at March 31, 2020		2,613			316			2,929		$	20.07

Performance awards and units may be granted to employees or consultants based upon, among other things, the contributions, responsibilities and other compensation of the particular employee or consultant. The value and the vesting of such performance awards and units are generally linked to one or more performance goals or other specific performance goals determined by the Company, in each case on a specified date or dates or over any period or periods determined by the Company, and range from zero to 100 percent of the grant.

As of March 31, 2020, there were approximately 815,000 shares reserved for grant under the Company’s 2003 Employee Stock Purchase Plan (the “ESPP”) and the International Employee Stock Purchase Plan (the “IESPP”), collectively.