XML 48 R33.htm IDEA: XBRL DOCUMENT
v3.20.4

Fair Value Measurements (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Fair Value, Measurement Inputs, Disclosure [Table Text Block] | Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020, and 2019, are summarized in the following tables.
| December 31, 2020 |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Available-for-sale securities | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Trading securities | 5 |  |  | 5 |  |  | — |  |  | — |
| December 31, 2019 |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Available-for-sale securities | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | 5 |
Trading securities | 4 |  |  | 4 |  |  | — |  |  | — |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following table summarizes changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the twelve months ended December 31, 2020, and 2019.
| Available-for- sale securities |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2018 | $ | 6 |  |  |  |  |  |  |  |  |  |  |  |  |
Return of principal on ARS | (1) |  |  |  |  |  |  |  |  |  |  |  |  |
Total realized/unrealized gains | — |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2019 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |
Return of principal on ARS | (3) |  |  |  |  |  |  |  |  |  |  |  |  |
Total realized/unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |
Included in investment income | 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Included in other comprehensive income | (4) |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2020 | $ | — |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
Name: | us-gaap_FairValueMeasurementInputsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration