Borrowings - Schedule of Future Principal Repayments (Detail) $ in Thousands	Jun. 30, 2024 USD ($)
Debt Instrument Redemption [Line Items]
Due in one year or less	$ 288,337
Due after one year through two years	0
Due after two years through three years	0
Due after three years through four years	0
Due after four years through five years	0
Thereafter	103,352
Total	391,689
Retail Repurchase Agreements [Member]
Debt Instrument Redemption [Line Items]
Due in one year or less	38,031
Due after one year through two years	0
Due after two years through three years	0
Due after three years through four years	0
Due after four years through five years	0
Thereafter	0
Total	38,031
Federal Home Loan Bank Advances [Member]
Debt Instrument Redemption [Line Items]
Due in one year or less	250,306
Due after one year through two years	0
Due after two years through three years	0
Due after three years through four years	0
Due after four years through five years	0
Thereafter	0
Total	250,306
Subordinated Debentures [Member]
Debt Instrument Redemption [Line Items]
Due in one year or less	0
Due after one year through two years	0
Due after two years through three years	0
Due after three years through four years	0
Due after four years through five years	0
Thereafter	28,352
Total	28,352
Subordinated Notes [Member]
Debt Instrument Redemption [Line Items]
Due in one year or less	0
Due after one year through two years	0
Due after two years through three years	0
Due after three years through four years	0
Due after four years through five years	0
Thereafter	75,000
Total	75,000
FRB Borrowings [Member]
Debt Instrument Redemption [Line Items]
Due in one year or less	0
Due after one year through two years	0
Due after two years through three years	0
Due after three years through four years	0
Due after four years through five years	0
Thereafter	0
Total	$ 0