Stockholders' equity:

12 Months Ended

Dec. 31, 2013

Stockholders' equity:

Stockholders' equity:

7. Stockholders' equity:

Authorized shares

        The Company has 75.0 million shares of authorized $0.001 par value common stock and 10,000 authorized but unissued shares of $0.001 par value preferred stock. The holders of common stock are entitled to one vote per common share and, subject to any rights of any series of preferred stock, dividends may be declared and paid on the common stock when determined by the Company's board of directors.

Common stock buybacks

        The Company's board of directors has approved $50.0 million for purchases of the Company's common stock under a buyback program (the "Buyback Program"). There is approximately $45.8 million remaining for purchases under the Buyback Program. During the year ended December 31, 2012 and 2011, the Company purchased approximately 0.1 million and 0.2 million shares of its common stock, respectively, for approximately $1.3 million and $3.0 million, respectively. These common shares were subsequently retired. There were no purchases of the Company's common stock in 2013.

Dividends on common stock

        Dividends are recorded as a reduction to retained earnings. Dividends on unvested restricted shares of common stock are paid as the awards vest. The Company's initial quarterly dividend payment was made in the third quarter of 2012. In addition to the Company's regular quarterly dividends, in 2013, the Company's board of directors approved an additional return of capital program (the "Capital Program") for the Company's shareholders. Under the Capital Program the Company plans on returning an additional capital to the Company's shareholders each quarter through either stock buybacks or a special dividend or a combination of stock buybacks and a special dividend. The aggregate payment under the Capital Program initially was at least $10.0 million each quarter and was increased to be at least $10.5 million each quarter. Amounts paid under the Capital Program are in addition to the Company's regular quarterly dividend payments. The initial $10.0 million ($0.22 per share) quarterly dividend payment under the Capital Program was paid to holders of record on November 27, 2013 on December 20, 2013. The total dividend paid on December 20, 2013 totaled $0.37 per share. On February 19, 2014, the Company's board of directors approved the payment of the Company's regular quarterly dividend of $0.16 per common share and a $10.5 million dividend ($0.23 per share) under the Company's Capital Program. The total dividend for the first quarter of 2014 of $0.39 per share will be paid to holders of record on March 7, 2014. This estimated $17.9 million dividend payment is expected to be made on March 27, 2014.

        A summary of the Company's quarterly dividends paid since its initial dividend payment is as follows (in thousands, except per share amounts):

Dividend Period	Amount per Common Share		Record Date	Payment Date	Dividends Paid
Q3 2012	$	0.10	August 22, 2012	September 12, 2012	$	4,537
Q4 2012	$	0.11	November 21, 2012	December 12, 2102	$	5,012
Q1 2013	$	0.12	March 4, 2013	March 15, 2013	$	5,489
Q2 2013	$	0.13	May 31, 2013	June 18, 2013	$	6,145
Q3 2013	$	0.14	September 5, 2013	September 25, 2013	$	6,512
Q4 2013	$	0.37	November 27, 2013	December 20, 2013	$	17,206

        The payment of any future dividends and any other returns of capital will be at the discretion of the Company's board of directors and may be reduced, eliminated or increased and will be dependent upon the Company's financial position, results of operations, available cash, cash flow, capital requirements and other factors deemed relevant by the Company's board of directors.