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Summary of Significant Accounting Policies (Details) $ in Thousands | Mar. 31, 2022 USD ($)
--- | ---
Net Investment Income [Line Items] |
Marketable investments | $ 101,301
Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 53,277
Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 48,024
Corporate Bond Securities [Member] |
Net Investment Income [Line Items] |
Marketable investments | 44,232
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 29,883
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 14,349
US Treasury Securities [Member] |
Net Investment Income [Line Items] |
Marketable investments | 23,394
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 23,394
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 0
Collateralized Mortgage-Backed Securities [Member] |
Net Investment Income [Line Items] |
Marketable investments | 6,653
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 0
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 6,653
U S Agency And Government Sponsored Securities [Member] |
Net Investment Income [Line Items] |
Marketable investments | 13,239
U S Agency And Government Sponsored Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 0
U S Agency And Government Sponsored Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 13,239
US Treasury Notes Securities [Member] |
Net Investment Income [Line Items] |
Marketable investments | 11,219
US Treasury Notes Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 0
US Treasury Notes Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 11,219
Asset-Backed Securities [Member] |
Net Investment Income [Line Items] |
Marketable investments | 2,564
Asset-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |
Net Investment Income [Line Items] |
Marketable investments | 0
Asset-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |
Net Investment Income [Line Items] |
Marketable investments | $ 2,564

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