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Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2017
Accumulated Other Comprehensive Income [Abstract] |
Summary Of Accumulated Other Comprehensive Income |
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﻿(Dollars in thousands) | Foreign Currency Items |  | Unrealized Gain (Losses) on Available-for-Sale Investments |  | Accrued Pension Service Costs |  | Total
﻿Balance at January 1, 2017 | $ | 14,784 |  | $ | 10 |  | $ | (2,719) |  | $ | 12,075
﻿Net current-period other comprehensive income |  | 10,173 |  |  | (4) |  |  | 155 |  |  | 10,324
﻿Balance at September 30, 2017 | $ | 24,957 |  | $ | 6 |  | $ | (2,564) |  | $ | 22,399
﻿

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e526-108580 + Details
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