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Income Taxes - Tax Cuts and Jobs Act (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes |  |  |
Percentage of tax on earnings in the form of cash and cash equivalents | 15.50% |  |
Percentage of tax on earnings other than in the form of cash and cash equivalents | 8.00% |  |
Provisional Toll tax |  | $ 3,600 | $ 4,600
Accrued income tax liabilities | $ 300 |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  | 35.00%
Tax related to GILTI | $ 600 | 400 |
Deferred tax assets | 68,060 | 71,939 |
Deferred tax assets valuation allowance | 8,327 | $ 6,835 |
Increase in valuation allowance | $ 1,500 |  |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to global intangible low-taxed income (GILTI). + References No definition available. + Details
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- Definition Represents the percentage of tax on earnings in the form of cash and cash equivalents. + References No definition available. + Details
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- Definition Represents the percentage of tax on earnings other than in the form of cash and cash equivalents. + References No definition available. + Details
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- Definition Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act of 2017. + References No definition available. + Details
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + 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 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32123-109318 + Details
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