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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Components of Other Comprehensive Income (Loss) and Related Tax Effects | The components of other comprehensive income (loss) and related tax effects are as follows:
|  | (In Thousands) |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Net unrealized gain (loss) on available-for-sale securities |  | $ | (1,058 | ) |  | $ | 267 |  |  | $ | (2,721 | )
Reclassification adjustment for (gain) loss on sale of available-for-sale securities |  |  | 9 |  |  |  | (47 | ) |  |  | (588 | )
Net unrealized gain (loss) on available-for-sale securities |  |  | (1,049 | ) |  |  | 220 |  |  |  | (3,309 | )
Tax expense (benefit) |  |  | (220 | ) |  |  | 74 |  |  |  | (1,125 | )
Other comprehensive income (loss) |  | $ | (829 | ) |  | $ | 146 |  |  | $ | (2,184 | )

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e526-108580 + Details
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