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STOCK BASED COMPENSATION PLANS - Exercise Prices (Details) - $ / shares | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Options | 110,660 | 47,393
Weighted Average Exercise Price | $ 35.71 | $ 36.19
$35.35 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Options | 63,267 |
Weighted Average Exercise Price | $ 35.35 |
$36.19 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Options | 47,393 |
Weighted Average Exercise Price | $ 36.19 |

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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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