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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock Compensation Expense (in thousands) |
|  | Year ended |  | Year ended |
|  | December 31, |  | December 31, |
|  | 2018 |  | 2017 |
Stock option grants |  | $ | 607 |  |  |  | 268 |
Annual director stock award(s) |  |  | 1,055 |  |  |  | 445 |
|  | $ | 1,662 |  |  |  | 713 |
Summary of Changes in outstanding options (in thousands, except share and per share amounts) |
|  |  | Weighted |  | Weighted |  | Weighted
| Number |  | Average |  | Average |  | Average
| of |  | Exercise |  | Remaining |  | Grant Date
Options | Shares |  | Price |  | Term (yrs) |  | Fair Value(000's)
Outstanding at |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
January 1, 2017 |  | 236,385 |  |  | $ | 25.35 |  |  |  | 6.1 |  |  | $ | 2,440 |
Granted |  | 30,255 |  |  | $ | 43.45 |  |  |  |  |  |  | $ | 440 |
Modification |  | — |  |  | $ | 30.21 |  |  |  |  |  |  | $ | (137 | )
Exercised |  | (92,130 | ) |  | $ | 24.93 |  |  |  |  |  |  | $ | (842 | )
Outstanding at |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2017 |  | 174,510 |  |  | $ | 28.70 |  |  |  | 6.0 |  |  | $ | 1,901 |
Granted |  | 29,260 |  |  | $ | 45.97 |  |  |  |  |  |  | $ | 427 |
Exercised |  | (56,232 | ) |  | $ | 25.17 |  |  |  |  |  |  | $ | (546 | )
Outstanding at |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 |  | 147,538 |  |  | $ | 33.48 |  |  |  | 6.7 |  |  | $ | 1,782 |
Exercisable at |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 |  | 119,714 |  |  | $ | 31.59 |  |  |  | 6.1 |  |  | $ | 1,346 |
Vested during |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
twelve months ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 |  | 46,030 |  |  |  |  |  |  |  |  |  |  | $ | 669 |
Summary of Stock Options Outstanding |
|  |  |  | Shares |  |  | Weighted |  |  | Weighted |
Range of Exercise |  |  |  | under |  |  | Average |  |  | Average |
Prices per Share |  |  |  | Option |  |  | Exercise Price |  | Remaining Life
Non-exercisable: |  |  |  |  |  |  |  |  |  |  |  |  |  |
$24.76 - $37.25 |  |  |  | 3,542 |  |  |  |  | 26.97 |  |  |  | 5.9 |
$37.26 - $45.97 |  |  |  | 24,282 |  |  |  |  | 43.74 |  |  |  | 9.5 |
|  |  |  | 27,824 |  |  |  | $ | 41.61 |  |  |  | 9.0 | Years
Exercisable: |  |  |  |  |  |  |  |  |  |  |  |  |  |
$16.71 - $24.75 |  |  |  | 14,100 |  |  |  |  | 16.72 |  |  |  | 2.9 |
$24.76 - $37.25 |  |  |  | 32,753 |  |  |  |  | 21.40 |  |  |  | 3.7 |
$37.26 - $45.97 |  |  |  | 72,861 |  |  |  |  | 39.04 |  |  |  | 7.8 |
|  |  |  | 119,714 |  |  |  | $ | 31.59 |  |  |  | 6.1 | Years
Total |  |  |  | 147,538 |  |  |  | $ | 33.48 |  |  |  | 6.7 | Years

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