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Summary of Significant Accounting Policies - Fair Value Measurements (Details) - Fair value measured on recurring basis - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Trading securities | $ 11,572 | $ 10,636
Derivative asset | 0 |
Derivative liability | 0 | 0
SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Trading securities | 141 | 256
Derivative asset | 1,214 |
Derivative liability | 15,412 | 49,703
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Trading securities | 0 | 0
Derivative asset | 0 |
Derivative liability | 0 | 0
Estimate of Fair Value Measurement |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Trading securities | 11,713 | 10,892
Derivative asset | 1,214 |
Derivative liability | 15,412 | 49,703
Money Market Funds | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 0 | 0
Money Market Funds | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 9,186 | 62,657
Money Market Funds | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 0 | 0
Money Market Funds | Estimate of Fair Value Measurement |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 9,186 | 62,657
Bank Time Deposits | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 0 | 0
Bank Time Deposits | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 2,175 | 2,121
Bank Time Deposits | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | 0 | 0
Bank Time Deposits | Estimate of Fair Value Measurement |  |
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items] |  |
Money market funds | $ 2,175 | $ 2,121

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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