Cash, Cash Equivalents and Investments - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Cash and Cash Equivalents [Abstract] | ||
| Realized gain (loss) on investments | $ 0.3 | $ 1.0 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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