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Stock-Based Compensation Plan (Tables) | 6 Months Ended
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Jun. 30, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Restricted Stock Activity |
| Six Months Ended
| June 30,
| 2019 |  | 2018
| Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Nonvested, beginning of period | 16,701 |  |  | $ | 29.72 |  |  | 14,401 |  |  | $ | 24.68 |
Granted | 17,200 |  |  | 30.84 |  |  | 16,950 |  |  | 32.84 |
Vested | (10,000 | ) |  | 29.38 |  |  | (9,109 | ) |  | 24.63 |
Forfeited | — |  |  | — |  |  | (41 | ) |  | 25.50 |
Nonvested, end of period | 23,901 |  |  | 30.67 |  |  | 22,201 |  |  | 30.93 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration