Summary of Significant Accounting Policies - Summary of Long-lived Assets by Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Total long-lived assets	$ 471,380	$ 481,428
The United States
Property, Plant and Equipment [Line Items]
Total long-lived assets	439,022	456,563
Others
Property, Plant and Equipment [Line Items]
Total long-lived assets	$ 32,358	$ 24,865

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

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