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Stock-Based Compensation | 9 Months Ended
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Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-Based Compensation |
5. | STOCK-BASED COMPENSATION
On September 30, 2018, the Company had stock options and stock awards outstanding under its 2006 Incentive Compensation Plan and stock options, stock awards and stock appreciation rights (SARs) outstanding under its 2011 Incentive Compensation Plan. SARs granted prior to 2015 are cash-settled, and SARs granted after 2014 are stock-settled. Stock options and SARs granted prior to 2017 generally cliff vested after two years. Starting in 2017, stock options and SARs have a three-year graded vesting feature, with one-third of the awards vesting each year. The Company has elected the straight-line method of expense attribution for the stock options and SARs with the graded vesting feature. Compensation expense recorded for all stock options, stock awards and SARs was as follows:
(In thousands) |  |  |  |  |  |  |  |  |
Three Months Ended September 30 |  |  | Nine Months Ended September 30 |
2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
$ | 3,335 |  |  | $ | 1,697 |  |  | $ | 6,722 |  |  | $ | 6,248 |
The year-over-year and quarter-over-quarter increase in stock-based compensation expense was primarily attributable to cash-settled SARs. SARs compensation expense increased due to an increase in the fair values of cash-settled SARs that resulted from an increase in the market value of Company common stock in the third quarter of 2018 and first nine months of 2018 versus the same periods in 2017. Unrecognized compensation costs for stock options, stock awards and SARs were as follows:
(In thousands) |  | September 30, 2018 |  |  | December 31, 2017 |
Stock options |  | $ | 1,917 |  |  | $ | 1,179 |
Stock awards |  |  | 3,987 |  |  |  | 3,737 |
SARs |  |  | 4,155 |  |  |  | 2,398 |
The increases in unrecognized compensation costs for stock options, stock awards and SARs reflected the 2018 grants of:
|  | Shares |
Stock options |  |  | 77,038 |
Stock awards (at target) |  |  | 49,426 |
SARs |  |  | 171,131 |
The unrecognized compensation costs at September 30, 2018, are expected to be recognized over weighted-average periods of 2.0 years, 1.8 years and 2.0 years for stock options, stock awards and SARs, respectively.

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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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