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Employee Share Plans (Tables) | 3 Months Ended
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Mar. 31, 2020
Schedule of Share-Based Compensation Awards | Compensation expense for stock-based awards recognized during the three months ended March 31, 2020 and 2019 was as follows (in thousands):
|  | Three Months Ended |
|  | March 31, |
|  | 2020 |  |  | 2019 |
Stock options |  | $ | 421 |  |  | $ | 519 |
Restricted stock units and awards |  |  | 1,171 |  |  |  | 929 |
Performance share units |  |  | 431 |  |  |  | 34 |
Total stock-based compensation expense |  | $ | 2,023 |  |  | $ | 1,482 |
Stock Award Activity | Stock Options and Restricted Stock Units and Awards – The following table presents our stock options and restricted stock award activity during the three months ended March 31, 2020 (in thousands, except per share data):
|  | Stock Options |  |  | Restricted Stock Units and Awards |
|  | Number of Options |  |  | Weighted Average Exercise Price Per Share |  |  | Number of Shares |  |  | Weighted Average Grant-Date Fair Value (1) |
Outstanding at beginning of year |  |  | 2,412 |  |  | $ | 13.58 |  |  |  | 577 |  |  | $ | 17.87 |
Granted |  |  | — |  |  | $ | — |  |  |  | 132 |  |  | $ | 25.75 |
Exercised / Vested |  |  | (116 | ) |  | $ | 8.76 |  |  |  | (85 | ) |  | $ | 18.62 |
Expired or cancelled |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |
Outstanding at March 31, 2020 |  |  | 2,296 |  |  | $ | 13.82 |  |  |  | 624 |  |  | $ | 19.43 |
Exercisable at March 31, 2020 |  |  | 1,340 |  |  | $ | 11.78 |  |  |  |  |  |  |  |  |
| (1) | Represents weighted average market value of the shares; awards are granted at no cost to the recipients.
Performance Shares [Member] |
Stock Award Activity | The following table presents our PSU award activity during the three months ended March 31, 2020 (in thousands, except per share data):
|  | Performance Share Units |  |  | Weighted Average Grant-Date Fair Value |
Outstanding at beginning of year |  |  | 200 |  |  | $ | 19.82 |
Granted |  |  | 132 |  |  | $ | 25.75 |
Vested |  |  | — |  |  | $ | — |
Expired or cancelled |  |  | — |  |  | $ | — |
Outstanding at March 31, 2020 |  |  | 332 |  |  | $ | 22.17 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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