Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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Income Taxes - Narrative and Unrecognized Tax Benefits (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Unrecognized tax benefits	$ 0	$ 0	$ 1,500,000
Domestic Tax Authority
Income Taxes [Line Items]
Operating loss carryforwards	323,600,000
Deferred tax assets, net	67,900,000
State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards	208,600,000
Deferred tax assets, net	$ 11,700,000