Long-Term Borrowings - FHLB Advances and Related Weighted Average Interest Rates (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
FHLB advances, Amount	$ 1,510,487	$ 1,910,775
FHLB advances, Weighted-Average Contractual Rate	5.43%	4.18%
FHLB advances, Weighted-Average Effective Rate	3.75%	3.19%

Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480876/942-470-45-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480848/942-470-50-3

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant