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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Level 3 Inputs) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Other assets and (liabilities) |  |
Total realized and unrealized gains (losses) |  |
Amounts acquired | $ 19,970 |
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 46,186 | $ (2,952)
Total realized and unrealized gains (losses) |  |
Total foreign exchange gains | 5 |
Purchases | 13,405 | 45,254
Settlements | 20 | 983
Amounts acquired | 19,970 |
Ending balance | 79,365 | 46,186
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Other income (loss) |  |
Total realized and unrealized gains (losses) |  |
Included in other income | (221) | 2,901
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Other investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 54,545 | 0
Total realized and unrealized gains (losses) |  |
Total foreign exchange gains | 5 |
Purchases | 17,958 | 54,545
Settlements | 0 | 0
Amounts acquired | 0 |
Ending balance | 74,634 | 54,545
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Other investments | Other income (loss) |  |
Total realized and unrealized gains (losses) |  |
Included in other income | 2,126 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Other assets and (liabilities) |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | (8,359) | (2,952)
Total realized and unrealized gains (losses) |  |
Total foreign exchange gains | 0 |
Purchases | (4,553) | (9,291)
Settlements | 20 | 983
Ending balance | 4,731 | (8,359)
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Other assets and (liabilities) | Other income (loss) |  |
Total realized and unrealized gains (losses) |  |
Included in other income | $ (2,347) | $ 2,901

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- Definition Amount of gain (loss) recognized in income from asset and liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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