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Income Taxes (Components of Deferred Tax Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Components Of Deferred Tax Liabilities Abstract |  |
Deferred Tax Assets, Net | $ 128,270 | $ 127,421

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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