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Investments - Schedule of amortized cost of debt securities categorized as held-to-maturity aggregated by credit quality (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 201,666
AAA or equivalent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	38,247
AA or equivalent, includes securities issued by the United States Government or Government Sponsored Enterprises
Financing Receivable, Credit Quality Indicator [Line Items]
Total	44,013
A or equivalent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	23,823
BBB or equivalent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	19,268
Unrated
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 76,315

X

- Definition

Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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X

- Details

Name:	srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsBBBRatingMember
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X

- Details

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