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Income Taxes (Summary Of Tax Credit Carryforwards) (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Tax Credit Carryforward [Line Items] |
Total net operating loss amount | $ 156,598
Operating loss carryforward expiration year 2021 |
Tax Credit Carryforward [Line Items] |
Net operating loss amount | 21,026
Operating loss carryforward expiration year 2022 |
Tax Credit Carryforward [Line Items] |
Net operating loss amount | 115,000
Operating loss carryforward expiration year 2023 |
Tax Credit Carryforward [Line Items] |
Net operating loss amount | 5,712
Operating loss carryforward expiration year 2024 |
Tax Credit Carryforward [Line Items] |
Net operating loss amount | 3,566
Operating loss carryforward expiration year 2025 and beyond [Member] |
Tax Credit Carryforward [Line Items] |
Net operating loss amount | $ 11,294

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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