XML 41 R28.htm IDEA: XBRL DOCUMENT
v3.20.2

Marketable Securities (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2020
Marketable Securities [Abstract] |
Investments Available For Sale | Available For Sale and Equity Securities on the accompanying Consolidated Balance Sheets consist of:
| At June 30, 2020 |  |  |  |  |  |
| Cost Amount |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value
Available-for-sale debt securities | $ | 91,666 |  |  | $ | 2,501 |  |  | $ | — |  |  | $ | 94,167 |
SEI-sponsored mutual funds | 7,514 |  |  | 72 |  |  | (594) |  |  | 6,992 |
Equities and other mutual funds | 3,600 |  |  | 602 |  |  | — |  |  | 4,202 |
| $ | 102,780 |  |  | $ | 3,175 |  |  | $ | (594) |  |  | $ | 105,361 |
| At December 31, 2019 |  |  |  |  |  |
| Cost Amount |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value
Available-for-sale debt securities | $ | 104,193 |  |  | $ | 605 |  |  | $ | — |  |  | $ | 104,798 |
SEI-sponsored mutual funds | 7,564 |  |  | 125 |  |  | (39) |  |  | 7,650 |
Equities and other mutual funds | 3,637 |  |  | 832 |  |  | — |  |  | 4,469 |
| $ | 115,394 |  |  | $ | 1,562 |  |  | $ | (39) |  |  | $ | 116,917 |

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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