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Income Taxes Income Taxes - Effect of Income Taxes on Net Income and Stockholders' Equity (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Expense (Benefit) [Roll Forward] |  |  |
Income tax expense (benefit) | $ 5,134 | $ 44,464 | $ 30,709
Net Unrealized Losses On Securities Tax Effect | 11,832 | (30,838) | 41,602
Valuation Allowances And Reserves Charged To Equity | (9,095) | 4,616 | (13,647)
Income Tax Effects Allocated Directly to Equity | 2,527 | 0 | 0
Unrealized Loss on FX Tax Effect | 0 | 25,776 | (58,527)
Change in Retirement Benefits Tax Effect | (371) | 446 | 3,278
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, Tax | 161 | 0 | 0
Income Tax Effects Allocated Directly to Equity, Other | $ 7,661 | $ 44,464 | $ 30,709

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- Definition The sum of the tax effects of all items occurring during the period that have been charged or credited directly to other comprehensive income or to related components of shareholders' equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 + Details
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- Definition The tax effect of items occurring during the period that have been charged or credited directly to components of shareholders' equity and are not otherwise defined. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324 + Details
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