Investments (Limited Partnership Investments) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Schedule Of Investments [Line Items]
Recognized investment income (loss)	$ 19	$ 1,572	$ 1,799	$ 2,359
Return on investment			2,046	1,792
Limited Partnership [Member]
Schedule Of Investments [Line Items]
Limited partnership investment, estimated unfavorable change in net asset value	516		516
Cash distributions	2,785	2,421	4,381	4,445
Return on investment	1,235	$ 1,314	2,046	$ 1,792
Company's net cumulative contributed capital to the partnership	27,180		27,180		$ 28,371
Maximum exposure loss relating to VIE	$ 26,695		$ 26,695		$ 28,133

Represents the amount of cumulative cash contribution to acquire limited partnership interest as of the reporting date.

No definition available.

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- Definition

Distributions from limited partnership for return on investment.

+ References

No definition available.

+ Details

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- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its limited partnership interests to which the equity method of accounting is applied and the holding of these interests is for investment purposes.

+ References

No definition available.

+ Details

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- Definition

Limited partnership investment, estimated unfavorable change in net asset value.

+ References

No definition available.

+ Details

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- Definition

Amount of cash distribution paid to unit-holder of limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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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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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=123419778&loc=d3e5728-111685

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