14. Common Stock

Common stock par value $0.01 per share, was authorized in the amount of 150,000 thousand shares, of which 40,627 thousand shares were issued and 34,048 thousand shares were outstanding as of December 31, 2013.

Changes in common stock for each period are as follows:


	Year Ended December 31,
	2013					2012 (As Restated)					2011 (As Restated)
	Shares			Amount		Shares			Amount		Shares			Amount
Common stock at the beginning of the period		35,635,357		$	396		37,907,575		$	394		38,401,989		$	384
Forfeiture of restricted stock bonuses		—			—		—			—		(3,465	)		—
Issuance of common stock		—			—		4,499			—		950,586			10
Exercise of stock options		579,476			6		155,708			2		90,005			—
Exercise of warrants		448,281			4		52			—		—			—
Acquisitions of treasury stock		(2,614,748	)		—		(2,432,477	)		—		(1,531,540	)		—

Total common stock outstanding at the end of the period		34,048,366		$	406		35,635,357		$	396		37,907,575		$	394

On October 7, 2011, the Board of Directors adopted a stock repurchase program whereby the Company may, subject to prevailing market conditions and other factors, repurchase up to $35 million of its outstanding common stock. The Board of Directors extended and increased the program by an additional $25 million in August 2012, for a maximum aggregate repurchase amount under the original program of up to $60 million. On July 30, 2013, the Company announced that the Board of Directors approved a new stock repurchase program under which the Company is authorized to repurchase up to $100 million of its common stock. The new stock repurchase program was effective August 5, 2013 through December 15, 2014, and replaced the original stock repurchase program. The stock repurchase program did not require that the Company purchases a minimum amount of shares of its common stock and may be commenced, suspended, resumed or terminated at any time without notice. The timing and extent of any repurchases will depend upon prevailing market conditions, the trading price of the Company’s common stock and other factors, and subject to contractual restrictions and restrictions under applicable law and regulations. The Company purchased 2,615 thousand shares of common stock on the open market at a cost of $51,000 thousand for the year ended December 31, 2013 and 2,432 thousand shares of common stock at a cost of $28,125 thousand for the year ended December 31, 2012. For the year ended December 31, 2011, the Company purchased 1,532 thousand shares of common stock at a cost of $11,793 thousand. The Company accounted for the treasury stock using the cost method, which treats it as a temporary reduction in stockholders’ equity. As a result, the stockholders’ equity has decreased by $51,000 thousand, $28,125 thousand and $11,793 thousand for the years ended December 31, 2013, 2012 and 2011, respectively. In March 2014, the Board of Directors suspended the stock repurchase program indefinitely pending the completion of the Independent Investigation, and the stock repurchase program expired by its terms on December 15, 2014. Subsequent to December 31, 2013, the Company did not repurchase any shares under the stock repurchase program.