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Summary of Significant Accounting Policies (Recently Adopted Accounting Principles) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Accounting Standards Update 2016-01 [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount | $ 2,203

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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to excess tax benefit for share-based compensation cost. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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