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Pension and Other Postretirement Plans (Tables) | 6 Months Ended
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Jun. 30, 2018
Pension and Other Postretirement Plans [Abstract] |
Summary of Stock Option Activity |
﻿ |  |  |  |  |  |  |  |
﻿ |  | Number of Option |  |  |  |  |  |
﻿ |  | Shares |  |  | Range of Exercise Prices |  |  | Weighted Average Exercise Price
﻿ |  |  |  |  |  |  |  |
﻿Outstanding at December 31, 2017 |  | 889,300 |  | $ | 8.93-13.32 |  | $ | 11.42
﻿ |  |  |  |  |  |  |  |
﻿Options granted |  | - |  |  | - |  |  | -
﻿Options exercised |  | (200) |  |  | 10.55 |  |  | 10.55
﻿Options forfeited |  | - |  |  | - |  |  | -
﻿Options expired |  | - |  |  | - |  |  | -
﻿ |  |  |  |  |  |  |  |
﻿Outstanding at June 30, 2018 |  | 889,100 |  | $ | 8.93-13.32 |  | $ | 10.91
﻿ ﻿
﻿ |  |  |  |  |  |  |  |
﻿ |  | Number of Option |  |  |  |  |  |
﻿ |  | Shares |  |  | Range of Exercise Prices |  |  | Weighted Average Exercise Price
﻿ |  |  |  |  |  |  |  |
﻿Outstanding at December 31, 2016 |  | 575,000 |  | $ | 8.93-13.32 |  | $ | 10.78
﻿ |  |  |  |  |  |  |  |
﻿Options granted |  | - |  |  |  |  |  |
﻿Options exercised |  | (700) |  |  | 10.55 |  |  | 0.00
﻿Options forfeited |  | (35,000) |  |  | 8.93-13.32 |  |  | -
﻿Options expired |  | - |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿Outstanding at June 30, 2017 |  | 539,300 |  | $ | 8.93-13.32 |  | $ | 10.78
﻿

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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