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Earnings per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings per share (in thousands, except per share amounts) |
| Three Months ended |  | Nine Months ended
| September 30, |  | September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Weighted average common shares |  |  |  |  |  |  |
outstanding during the period |  |  |  |  |  |  |
- shares used for basic |  |  |  |  |  |  |
earnings per common share |  | 10,062 |  |  |  | 10,004 |  |  |  | 10,037 |  |  |  | 9,967 |
Common shares issuable under |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
share based payment plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
which are potentially dilutive |  | 73 |  |  |  | 62 |  |  |  | 73 |  |  |  | 68 |
Common shares used for diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
earnings per common share |  | 10,135 |  |  |  | 10,066 |  |  |  | 10,110 |  |  |  | 10,035 |
Net income attributable to the Company | $ | 2,224 |  |  |  | 25,391 |  |  |  | 123,766 |  |  |  | 28,547 |
Basic earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 0.22 |  |  |  | 2.54 |  |  |  | 12.33 |  |  |  | 2.86 |
Diluted | $ | 0.22 |  |  |  | 2.52 |  |  |  | 12.24 |  |  |  | 2.84 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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