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Stock Compensation - Restricted Stock and Performance Share Grants | 12 Months Ended
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Dec. 31, 2017
Stock Compensation - Restricted Stock and Performance Share Grants [Abstract] |
Stock Compensation - Restricted Stock and Performance Share Grants | STOCK COMPENSATION - RESTRICTED STOCK AND PERFORMANCE SHARE GRANTS The Company’s stock incentive plans provide for the making of awards to employees based upon a service condition or through the achievement of performance-related objectives. The Company has issued three types of stock grant awards under these plans: restricted stock with service condition vesting; performance share grants that only vest upon the achievement of specified performance conditions, such as corporate cash flow goals, or Performance Condition Grants; and performance share grants that include threshold, target, and maximum achievement levels based on the achievement of specific performance milestones, or Performance Milestone Grants. The Company has also granted performance share grants that contain both performance-based and market-based conditions. Compensation cost for these awards is recognized based on either the achievement of the performance-based conditions, if they are considered probable, or if they are not considered probable, on the achievement of the market-based condition. Failure to satisfy the threshold performance conditions will result in the forfeiture of shares. Forfeiture of share awards with service conditions or performance-based restrictions results in a reversal of previously recognized share-based compensation expense. Forfeiture of share awards with market-based restrictions does not result in a reversal of previously recognized share-based compensation expense. The following is a summary of the Company's performance share grants with performance conditions for the year ended December 31, 2017:
Performance Share Grants with Performance Conditions
Below threshold performance |  | — |
Threshold performance |  | 169,178 |
Target performance |  | 387,886 |
Maximum performance |  | 589,415 |
The following is a summary of the Company’s stock grant activity, both time and performance unit grants, assuming target achievement for outstanding performance grants for the following twelve-month periods ended:
| December 31, 2017 |  | December 31, 2016 |  | December 31, 2015
Stock Grants Outstanding Beginning of the Year at Target Achievement | 386,171 |  |  | 272,353 |  |  | 237,045 |
New Stock Grants/Additional shares due to achievement in excess of target | 295,243 |  |  | 287,091 |  |  | 114,221 |
Vested Grants | (99,769 | ) |  | (172,749 | ) |  | (52,436 | )
Expired/Forfeited Grants | (44,785 | ) |  | (524 | ) |  | (26,477 | )
Stock Grants Outstanding at Target Achievement | 536,860 |  |  | 386,171 |  |  | 272,353 |
The unamortized cost associated with nonvested stock grants and the weighted-average period over which it is expected to be recognized as of December 31, 2017 was $5,514,000 and 24 months, respectively. The fair value of restricted stock with time-based vesting features is based upon the Company’s share price on the date of grant and is expensed over the service period. Fair value of performance grants that cliff vest based on the achievement of performance conditions is based on the share price of the Company’s stock on the day of grant once the Company determines that it is probable that the award will vest. This fair value is expensed over the service period applicable to these grants. For performance grants that contain a range of shares from zero to maximum we determine, based on historic and projected results, the probability of (1) achieving the performance objective, and (2) the level of achievement. Based on this information, we determine the fair value of the award and measure the expense over the service period related to these grants. Because the ultimate vesting of all performance grants is tied to the achievement of a performance condition, we estimate whether the performance condition will be met and over what period of time. Ultimately, we adjust compensation cost according to the actual outcome of the performance condition. Under the Non-Employee Director Stock Incentive Plan, or NDSI Plan, each non-employee director receives his or her annual compensation in stock. The performance share grant approved by the Board in March 2014, included the modification of existing performance milestone grants totaling 133,890 restricted stock units and the issuance of new performance share grants totaling 89,837 restricted stock units. The restricted stock units of the modified existing performance milestone grants have been accounted for as probable-to-probable modification since the Company has determined that achieving the existing performance milestones was probable. The unamortized total cost relating to these probable-to-probable modified performance share grants is being recognized ratably over the new requisite service period. The impact of modifying the existing performance stock grants is an annual expense of $1,109,000 over the service period. The values for the 2014 performance grants, including the new milestone grants, are fixed at threshold, target and maximum performance values, meaning that the number of shares at vesting will vary depending on the stock price at that time. The total value for these grants at maximum performance is $5,702,000. During the second quarter of 2015, the 2014 performance milestone grants were modified to fix the number of shares to be received rather than have the number of shares to be issued at vesting float with the price of the stock, which converted the awards from liability awards to equity awards. As such, we reclassified $1,065,000 from other liabilities to equity. This resulted in a probable-to-probable modification and had no impact on earnings. In 2016, these milestone performance grants were met at levels above target and at target achievement levels. The following table summarizes stock compensation costs for the Company's 1998 Stock Incentive Plan, or the Employee 1998 Plan, and NDSI Plan for the following periods:
Employee 1998 Plan ($ in thousands): |  | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015
Expensed |  | $ | 2,889 |  |  | $ | 3,847 |  |  | $ | 2,989 |
Capitalized |  | 555 |  |  | 296 |  |  | 165 |
|  | 3,444 |  |  | 4,143 |  |  | 3,154 |
NDSI Plan |  | 663 |  |  | 738 |  |  | 768 |
|  | $ | 4,107 |  |  | $ | 4,881 |  |  | $ | 3,922 |

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