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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted income per share, including a reconciliation of net income and the number of shares used in computing basic and diluted income per share. Basic income per share is determined using the weighted average shares of common stock (including DSUs) outstanding during the period. Diluted income per share is determined using the weighted average shares of common stock (including DSUs) outstanding during the period, and assumes all potentially dilutive securities were converted into common shares at the earliest date possible. There were no potentially dilutive securities outstanding during the years ended December 31, 2017, 2016 and 2015.
| For the Year Ended December 31,
(Amounts in thousands, except share and per share amounts) | 2017 |  | 2016 |  | 2015
Net income | $ | 80,509 |  |  | $ | 86,477 |  |  | $ | 76,907 |
Weighted average shares outstanding – basic and diluted | 5,115,501 |  |  | 5,114,084 |  |  | 5,112,352 |
Net income per common share – basic and diluted | $ | 15.74 |  |  | $ | 16.91 |  |  | $ | 15.04 |

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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://www.xbrl.org/2003/role/presentationRef -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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