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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract] |  |
Net Income (Loss) | $ (10,814) | $ 6,651
Other Comprehensive Income (Loss), net of tax |  |
Net unrealized gains (losses) on available-for-sale securities | (3,412) | 1,335
Net unrealized gains (losses) on cash flow hedges |  | 79
Defined benefit plan adjustments | 62 | 55
Foreign currency translation | 842 | 1,242
Other Comprehensive Income (Loss), net of tax | (2,508) | 2,711
Comprehensive Income (Loss), net of tax | $ (13,322) | $ 9,362

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580 + Details
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