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Income Taxes - Narrative (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |
Increase (Decrease) In IRC 162(m) Limitation |  | $ 2,400,000 |
Decrease in excess tax benefit, shared-based compensation and additional expenses | $ 5,800,000 |  |
Discrete tax benefits related to excess tax benefits from stock-based compensation | 1,200,000 | (4,600,000) |
Deferred tax assets, valuation allowance |  | 0 |
Unrecognized tax benefits | 9,660,000 | $ 8,481,000 | $ 8,300,000
Unrecognized tax benefits, income tax penalties and interest accrued | 700,000 |  | $ 500,000
Federal |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 31,900,000 |  |
State |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 57,900,000 |  |
Operating loss carryforward, subject to expiration | 31,700,000 |  |
Operating loss carryforward, not subject to expiration | 26,200,000 |  |
State | Latest tax year |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Tax credit carryforwards | 16,300,000 |  |
State | Tax year 2023-2027 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Tax credit carryforwards | $ 1,100,000 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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