Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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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.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Investments In Nonqualified Retirement Plan Assets

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Assets
Cash equivalents	$ 178,556,000	$ 207,101,000
Investment securities - fair value
Fair Value	40,904,000	39,990,000
Total assets measured at fair value	230,637,000	257,703,000
Sponsored funds
Investment securities - fair value
Fair Value	26,598,000	25,909,000
Equity securities
Investment securities - fair value
Fair Value	14,303,000	14,078,000
Debt securities
Investment securities - fair value
Fair Value	3,000	3,000
Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	11,177,000	10,612,000
Level 1
Assets
Cash equivalents	178,556,000	207,101,000
Investment securities - fair value
Total assets measured at fair value	230,634,000	257,700,000
Level 1 \| Sponsored funds
Investment securities - fair value
Fair Value	26,598,000	25,909,000
Level 1 \| Equity securities
Investment securities - fair value
Fair Value	14,303,000	14,078,000
Level 1 \| Debt securities
Investment securities - fair value
Fair Value	0	0
Level 1 \| Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	11,177,000	10,612,000
Level 2
Assets
Cash equivalents	0	0
Investment securities - fair value
Total assets measured at fair value	3,000	3,000
Level 2 \| Sponsored funds
Investment securities - fair value
Fair Value	0	0
Level 2 \| Equity securities
Investment securities - fair value
Fair Value	0	0
Level 2 \| Debt securities
Investment securities - fair value
Fair Value	3,000	3,000
Level 2 \| Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	0	0
Level 3
Assets
Cash equivalents	0	0
Investment securities - fair value
Total assets measured at fair value	0	0
Level 3 \| Investments
Investment securities - fair value
Recurring basis, assets	0		$ 0
Level 3 \| Sponsored funds
Investment securities - fair value
Fair Value	0	0
Level 3 \| Equity securities
Investment securities - fair value
Fair Value	0	0
Level 3 \| Debt securities
Investment securities - fair value
Fair Value	0	0
Level 3 \| Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	$ 0	$ 0