8. Equity Compensation Plans and Equity

Stock Option and Restricted Stock Plans

We have several stock option and restricted stock plans. On April 1, 2010, the Board of Directors of the Company, and on May 14, 2010, our shareholders, approved the 2010 Stock Incentive Plan (the "2010 Plan"). The 2010 Plan replaced the 2000 Stock Incentive Plan, as amended (the "2000 Plan"), as the Company's active stock plan. The Company's employees, directors and consultants are eligible to receive awards under the 2010 Plan. The 2010 Plan permits the granting of a variety of awards, including both non-qualified and incentive stock options, share appreciation rights, restricted shares, restricted share units and dividend equivalent rights. The Company is authorized to issue up to 3,500,000 shares under the 2010 Plan. Option awards are generally granted with an exercise price equal to the closing price of the Company's stock on the trading day prior to the date of grant; those option awards generally vest over a 3 year period and have a 7 or 10-year term. Restricted share awards generally vest over 1-5 years. Certain option and share awards provide for accelerated vesting if there is a change in control, as defined in the 2010 Plan. As of December 31, 2012, there are 1,448,132 options outstanding under this plan.

The 2000 Plan was approved by the Board of Directors and shareholders in May 2000. The 2000 Plan provides for the grant to officers and key employees of stock awards, either in the form of options to purchase shares of our common stock or restricted stock awards. Stock awards granted pursuant to the 2000 Plan expire after seven years and generally vest over a two-year to five-year period following the grant date. In addition, the 2000 Plan provides for automatic annual grants of restricted stock to each member of our Board of Directors who is not an employee. As of December 31, 2012, there are 873,522 options outstanding under this plan.

Equity-Based Compensation Expense, Stock Option and Restricted Stock Activity

Equity-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense over the employee requisite service period. We recorded equity compensation expense of $14.3 million, $12.8 million and $8.8 million for the years ended December 31, 2012, 2011 and 2010, respectively. We did not capitalize any equity compensation in the years ended December 31, 2012, 2011, and 2010.

During the year ended December 31, 2011, we discontinued our CIGS solar systems business and as a result the equity-based compensation expense related to each CIGS solar systems business employee has been classified as discontinued operations in determining the consolidated results of operations for the years ended December 31, 2011 and 2010. For the years ended December 31, 2011 and 2010 discontinued operations included compensation expense of $0.7 million and $0.9 million, respectively.

As a result of the sale of our Metrology segment to Bruker, equity-based compensation expense related to Metrology employees has been classified as discontinued operations in determining the consolidated results of operations for the year ended December 31, 2010. For the year ended December 31, 2010, discontinued operations included compensation expense of $7.7 million that related to the acceleration of equity awards from employees that were terminated as a result of the sale of our Metrology segment to Bruker.

As of December 31, 2012, the total unrecognized compensation cost related to nonvested stock awards and option awards expected to vest is $17.2 million and $13.1 million, respectively, and the related weighted average period over which it is expected that such unrecognized compensation costs will be recognized is approximately 2.8 years and 2.0 years for the nonvested stock awards and for option awards, respectively.

The fair value of each option granted during the years ended December 31, 2012, 2011 and 2010, was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:

	For the year ended December 31,

	2012			2011			2010
Weighted-average expected stock-price volatility		59	%		55	%		62	%
Weighted-average expected option life		5 years			4 years			5 years
Average risk-free interest rate		0.70	%		1.40	%		1.92	%
Average dividend yield		0	%		0	%		0	%

A summary of our restricted stock awards including restricted stock units as of December 31, 2012 is presented below:

			Weighted- Average Grant-Date Fair Value

Nonvested as of December 31, 2011	618		$	33.61
Granted	324			32.62
Vested	(167	)		20.60
Forfeited (including cancelled awards)	(82	)		34.98

Nonvested as of December 31, 2012	693		$	36.11

During the year ended December 31, 2012, we granted 323,766 shares of restricted common stock and restricted stock units to key employees, which generally vest over a four year period. Included in this grant were 15,294 shares of restricted common stock granted to the non-employee members of the Board of Directors, which vest over the lesser of one year or at the time of the next annual meeting. The vested shares include the impact of 53,399 shares of restricted stock which were cancelled in 2012 due to employees electing to receive fewer shares in lieu of paying withholding taxes. The total grant date fair value of shares that vested during the years ended December 31, 2012, 2011 and 2010 was $5.4 million, $9.7 million and $13.6 million, respectively.

A summary of our stock option plans as of and for the year ended December 31, 2012 is presented below:

			Weighted- Average Exercise Price		Aggregate Intrinsic Value (000's)

Outstanding as of December 31, 2011	2,106		$	25.58
Granted	704			32.55
Exercised	(351	)		15.39
Forfeited (including cancelled options)	(137	)		35.88

Outstanding as of December 31, 2012	2,322		$	28.63	$	13,149	6.4

Options exercisable as of December 31, 2012	1,282		$	22.63	$	12,948	4.5

The weighted-average grant date fair value of stock options granted for the years ended December 31, 2012, 2011 and 2010 was $15.56, $21.90 and $18.41 per option, respectively. The total intrinsic value of stock options exercised during the years ended December 31, 2012, 2011 and 2010 was $6.8 million, $22.8 million and $53.1 million, respectively.

The following table summarizes information about stock options outstanding as of December 31, 2012:

	Options Outstanding						Options Exercisable

Range of Exercise Prices	Number Outstanding at December 31, 2012 (000s)		Weighted-Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Number Exercisable at December 31, 2012 (000s)		Weighted- Average Exercise Price
$8.82 - 16.37		522		3.4	$	11.05		522	$	11.05
17.48 - 26.69		352		2.9		19.66		320		19.16
28.60 - 42.96		1,155		8.4		33.64		339		35.29
44.09 - 51.70		293		8.4		50.91		101		50.79

		2,322		6.4	$	28.63		1,282	$	22.63

Shares Reserved for Future Issuance

As of December 31, 2012, we have 3,358,032 shares reserved for future issuance upon exercise of stock options and grants of restricted stock.

Preferred Stock

Our Board of Directors has authority under our Certificate of Incorporation to issue shares of preferred stock with voting and economic rights to be determined by the Board of Directors.

Treasury Stock

On August 24, 2010, our Board of Directors authorized the repurchase of up to $200 million of our common stock. All funds for this repurchase program were exhausted as of August 19, 2011. Repurchases were made from time to time on the open market in accordance with applicable federal securities laws. During 2011, we purchased 4,160,228 shares for $162 million (including transaction costs) under the program at an average cost of $38.96 per share. During 2010, we purchased 1,118,600 shares for $38 million (including transaction costs) under the program at an average cost of $34.06 per share. This stock repurchase is included as treasury stock in the Consolidated Balance Sheet as of December 31, 2011. During the year ended December 31, 2012, we cancelled and retired the 5,278,828 shares of treasury stock we purchased under this repurchase program. As a result of this transaction, we recorded a reduction in treasury stock of $200.2 million and a corresponding reduction of $200.1 million and $0.1 million in retained earnings and common stock, respectively.