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Note 3 - Stock-based Compensation | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] |
3. | STOCK-BASED COMPENSATION
On February 21, 2013, the Compensation Committee of our Board of Directors approved, subject to stockholder approval, a third amendment (the "Third Amendment") to the 2006 Omnibus Incentive Plan (the "Incentive Plan"). The Third Amendment (i) provides that the maximum aggregate number of shares of Class A common stock available for grant of awards under the Incentive Plan from and after May 29, 2013, shall not exceed 750,000, plus any remaining available shares of the 800,000 shares previously made available under the second amendment to the Incentive Plan (the "Second Amendment"), and any expirations, forfeitures, cancellations, or certain other terminations of shares approved for grant under the Third Amendment or the Second Amendment previously reserved, plus any remaining expirations, forfeitures, cancellations, or certain other terminations of such shares, and (ii) re-sets the term of the Incentive Plan to expire with respect to the ability to grant new awards on March 31, 2023. The Incentive Plan permits annual awards of shares of our Class A common stock to executives, other key employees, non-employee directors, and eligible participants under various types of options, restricted share awards, or other equity instruments. At December 31, 2018 , 50,960 of the 1,550,000 shares noted above were available for award under the amended Incentive Plan. No participant in the Incentive Plan may receive awards of any type of equity instruments in any calendar-year that relates to more than 200,000 shares of our Class A common stock. No awards may be made under the Incentive Plan after March 31, 2023. To the extent available, we have issued treasury stock to satisfy all share-based incentive plans. Included in salaries, wages, and related expenses within the consolidated statements of operations is stock-based compensation expense of $4.8 million , $1.0 million , and $1.2 million in 2018 , 2017 , and 2016 , respectively. Included in general supplies and expenses within the consolidated statements of operations is stock-based compensation expenses for non-employee directors of $0.4 million in 2018 , $0.3 million in 2017 and $0.2 million in 2016 , respectively. All stock compensation expense recorded in 2018 , 2017 , and 2016 relates to restricted shares granted, as no options were granted during these periods. Associated with stock compensation expense was less than $0.1 million , of income tax expense in 2018 , as well as income tax benefit of $0.3 million and $0.2 million in 2017 and 2016 , respectively, related to the exercise of stock options and restricted share vesting. The Incentive Plan allows participants to pay the federal and state minimum statutory tax withholding requirements related to awards that vest or allows the participant to deliver to us shares of Class A common stock having a fair market value equal to the minimum amount of such required withholding taxes. To satisfy withholding requirements for shares that vested, certain participants elected to deliver to us 11,052 , 31,297 , and 55,429 Class A common stock shares, which were withheld at weighted average per share prices of $ 21.89 , $ 25.09 , and $ 20.61 , respectively, based on the closing prices of our Class A common stock on the dates the shares vested in 2018 , 2017 , and 2016 , respectively, in lieu of the federal and state minimum statutory tax withholding requirements. We remitted $0.2 million , $0.8 million , and $1.1 million in 2018 , 2017 , and 2016 , respectively, to the proper taxing authorities in satisfaction of the employees' minimum statutory withholding requirements. The payment of minimum tax withholdings on stock compensation are reflected within the issuances of restricted shares from treasury stock in the accompanying consolidated statement of stockholders' equity. The following table summarizes our restricted share award activity for the fiscal years ended December 31, 2018 , 2017 , and 2016 :
|  | Number of |  |  | Weighted |
|  | stock |  |  | average grant |
|  | awards |  |  | date fair |
|  | (in thousands) |  |  | value |
Unvested at December 31, 2015 |  |  | 330 |  |  | $ | 12.43 |
Granted |  |  | 120 |  |  | $ | 18.92 |
Vested |  |  | (169 | ) |  | $ | 5.28 |
Forfeited |  |  | (16 | ) |  | $ | 16.53 |
Unvested at December 31, 2016 |  |  | 265 |  |  | $ | 18.63 |
Granted |  |  | 434 |  |  | $ | 16.69 |
Vested |  |  | (96 | ) |  | $ | 12.78 |
Forfeited |  |  | (16 | ) |  | $ | 19.25 |
Unvested at December 31, 2017 |  |  | 587 |  |  | $ | 18.14 |
Granted |  |  | 153 |  |  | $ | 30.32 |
Vested |  |  | (35 | ) |  | $ | 25.97 |
Forfeited |  |  | (30 | ) |  | $ | 27.58 |
Unvested at December 31, 2018 |  |  | 675 |  |  | $ | 20.08 |
The unvested shares at December 31, 2018 will vest based on when and if the related vesting criteria are met for each award. All awards require continued service to vest, and 242,862 of these awards vest solely based on continued service, in varying increments between 2019 and 2022 . Performance based awards account for 432,575 of the unvested shares at December 31, 2018 , of which 123,744 shares have no unrecognized compensation cost as vesting is not probable , 85,326 shares have no unrecognized compensation cost based on the performance goals having been achieved for the year ended December 31, 2018 , and 223,505 shares relate to performance for the years ended December 31, 2019 through 2022 and have $2.3 million of unrecognized compensation cost. The fair value of restricted share awards that vested in 2018 , 2017 , and 2016 was approximately $0.7 million , $2.4 million , and $3.5 million , respectively. As of December 31, 2018 , we had approximately $5.9 million of unrecognized compensation expense related to 242,862 service-based shares and 223,505 performance-based share awards with 2019 through 2022 performance periods, which is probable to be recognized over a weighted average period of approximately 28 months. All restricted shares awarded to executives and other key employees pursuant to the Incentive Plan provide the holder with voting and other stockholder-type rights, but will not be issued until the relevant restrictions are satisfied. There were no outstanding stock options for the fiscal years ended December 31, 2018 , 2017 , and 2016 .

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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