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Income Taxes Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 0	$ 0	$ 0
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	0	0	0
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	0	0	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	0	0	0
Unrecognized Tax Benefits	0	0	0
UnrecognizedTaxBenefitsInterestOnIncomeTaxesPaid	$ 0	$ 0	$ 0

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- Definition

[Line Items] for Reconciliation of Unrecognized Tax Benefits [Table]

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No definition available.

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UnrecognizedTaxBenefitsInterestOnIncomeTaxesPaid

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Name Accounting Standards Codification
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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of interest expense accrued for an underpayment of income taxes.

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