Segment Information, Nature of Operations, and Certain Concentrations - Interest Income (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest income	$ 44,311	$ 11,879	$ 17,479
Mortgage Banking
Segment Reporting, Other Significant Reconciling Item [Line Items]
Interest income	11,853	8,725	8,930
Profit before taxes:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Interest income	11,853	8,725	8,930
Other unallocated interest income
Segment Reporting, Other Significant Reconciling Item [Line Items]
Other unallocated interest income	$ 32,458	$ 3,154	$ 8,549

Sum of interest income from operating activities and interest and fee income from mortgage loans considered to be held-for-sale.

No definition available.

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- Definition

Interest and fee income from mortgage loans considered to be held-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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- Definition

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

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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.

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