Summary of Significant Accounting Policies - Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Numerator: | |||||||||||
| Net income | $ 5,062 | $ 5,901 | $ 5,830 | ||||||||
| Less distributed and undistributed income allocated to participating securities | 222 | 251 | 159 | ||||||||
| Net Income Attributable to Common Shareholders | $ 1,128 | $ 1,341 | $ 1,273 | $ 1,319 | $ 1,967 | $ 1,378 | $ 1,527 | $ 1,029 | $ 4,840 | $ 5,650 | $ 5,671 |
| Denominator: | |||||||||||
| Weighted average common shares - Basic | 4,299 | 4,503 | 4,634 | ||||||||
| Weighted average common shares - Diluted | 4,299 | 4,503 | 4,634 | ||||||||
| Basic net income per common share-(restated) (in dollars per share) | $ 0.25 | $ 0.30 | $ 0.28 | $ 0.29 | $ 0.43 | $ 0.29 | $ 0.32 | $ 0.22 | $ 1.13 | $ 1.25 | $ 1.22 |
| Diluted net income per common share-(restated) (in dollars per share) | $ 0.25 | $ 0.30 | $ 0.28 | $ 0.29 | $ 0.43 | $ 0.29 | $ 0.32 | $ 0.22 | $ 1.13 | $ 1.25 | $ 1.22 |
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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