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Income Taxes Income Tax Disclosure (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |
Other Tax Expense (Benefit) |  | $ 3,500 |  |
Deferred Tax Assets, Gross |  | 20,483 | $ 20,180 |
Deferred Tax Liabilities, Gross |  | 10,852 | 6,698 |
Deferred Tax Assets, Net of Valuation Allowance |  | $ 9,631 | $ 13,482 |
Effective Income Tax Rate, Continuing Operations |  | 23.15% | 23.80% | 40.09%
Effective Income Tax Rate Reconciliation, Deferred asset re-measurement as a result of Tax Act | $ 6,500 | $ 0 | $ 0 | $ 6,520
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 0 | $ 0 | $ 0 | $ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 21.00% |  | 35.00%

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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