Stockholder's Equity | Stockholders' Equity During the three -month period ended March 26, 2017 , we repurchased 1,362,890 shares of our common stock for an aggregate purchase price of $212,250 . The repurchased shares were concurrently retired and credited to authorized, but unissued stock. The repurchase of these shares and other activity resulted in a decrease in common stock of $7,653 and a decrease in retained earnings of $204,597 for the same period. We have 1.6 million shares of common stock reserved for issuance under our 2012 Equity Incentive Plan (Plan) for our employees, officers, and directors. The Plan had 740,288 shares available for grant as of March 26, 2017 . Stock Options The exercise price for stock options issued under the Plan is to be not less than the fair market value on the date of grant with respect to incentive and nonqualified stock options. Incentive stock options vest in 4 equal annual installments from the date of grant and have a contractual life of seven years. Nonqualified stock options issued pursuant to the Plan have a four -year vesting period, which vest in ratable annual installments, and have a contractual life of seven years. Incentive stock options may be granted under this plan until March 12, 2022. We issue new shares of common stock upon the exercise of stock options. Option activity for the three months ended March 26, 2017 is summarized as follows: Number of shares Weighted average exercise price Average remaining contractual life (years) Aggregate intrinsic value Outstanding, December 25, 2016 145,624 $ 129.89 4.1 $ 5,076 Granted 1,670 160.20 Exercised (8,185 ) 84.54 Cancelled (4,567 ) 158.52 Outstanding, March 26, 2017 134,542 $ 132.05 3.9 $ 3,241 Exercisable, March 26, 2017 88,007 $ 117.47 3.2 $ 3,222 The aggregate intrinsic value in the table above is before applicable income taxes, based on our closing stock price of $148.25 as of the last business day of the three -month period ended March 26, 2017 , which would have been received by the optionees had all options been exercised and sold on that date. As of March 26, 2017 , total unrecognized stock-based compensation expense related to nonvested stock options was approximately $1,865 , which is expected to be recognized over a weighted average period of approximately 2.2 years . During the three -month periods ended March 26, 2017 and March 27, 2016 , the total intrinsic value of stock options exercised was $551 and $533 , respectively. During the three -month periods ended March 26, 2017 and March 27, 2016 , the weighted average grant date fair value of options was $44.93 and $0 , respectively. During the three -month periods ended March 26, 2017 and March 27, 2016 , the total fair value of options vested was $19 and $0 , respectively. Restricted Stock Units Restricted stock units are granted annually under the Plan at the discretion of the Compensation Committee of our Board of Directors. We grant restricted stock units subject to three -year cliff vesting and a cumulative three -year earnings target. The number of units that vest at the end of the three-year period is based on actual performance against the target. These restricted stock units are subject to forfeiture if they have not vested at the end of the three -year period. Stock-based compensation is recognized for the number of units expected to vest at the end of the period and is expensed beginning on the grant date through the end of the performance period. For each grant, restricted stock units meeting the performance criteria will vest as of the end of the third fiscal year in the performance period, subject to a Plan-specified maximum number of shares that may be issued to any individual in any year in settlement of restricted stock units. The distribution of vested restricted stock units as common stock typically occurs in March of the following year. The common stock is issued to participants net of the number of shares required for employee withholding taxes, which can be withheld up to the relevant jurisdiction's maximum statutory rate. We issue new shares of common stock upon the disbursement of restricted stock units. Restricted stock units are contingently issuable shares, and the activity for the three months ended March 26, 2017 was as follows: Number of shares Weighted average grant date fair value Outstanding, December 25, 2016 202,047 $ 160.03 Granted 5,400 166.62 Cancelled (11,671 ) 163.13 Outstanding, March 26, 2017 195,776 $ 160.03 As of March 26, 2017 , the total stock-based compensation expense related to nonvested awards not yet recognized was $1,154 , which is expected to be recognized over a weighted average period of 1.9 years. The weighted average grant date fair value of restricted stock units granted during the three -month period ended March 26, 2017 was $166.62 . We granted no restricted stock units during the three-month period ended March 27, 2016 . No shares of restricted stock vested during the three-month periods ended March 26, 2017 and March 27, 2016 . During the three -month periods ended March 26, 2017 and March 27, 2016 , we recognized $155 and $1,111 , respectively, of stock-based compensation expense related to restricted stock units. Employee Stock Purchase Plan We have reserved 600,000 shares of common stock for issuance under our Employee Stock Purchase Plan (ESPP). The ESPP is available to substantially all employees subject to employment eligibility requirements. Participants may purchase our common stock at 85% of the beginning or ending closing price, whichever is lower, for each six-month period ending in May and November. During the three -month periods ended March 26, 2017 , and March 27, 2016 , we issued no shares of common stock under the ESPP. As of March 26, 2017 , we had 161,139 shares available for future issuance under the ESPP. |