Borrowed Funds - Components of Borrowed Funds (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Long-term debt	$ 654,380	$ 385,292
Total borrowed funds	654,380	385,292
Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Long-term debt	216,826	76,782
Subordinated notes 3.70%, net of issuance costs [Member]
Debt Instrument [Line Items]
Long-term debt	188,739	199,681
Subordinated notes 6.25%, net of issuance costs [Member]
Debt Instrument [Line Items]
Long-term debt	108,935	$ 108,829
Subordinated notes 2.75% [Member]
Debt Instrument [Line Items]
Long-term debt	$ 139,880