Quarterly report [Sections 13 or 15(d)]

Securities - Summary of Investment Securities Available for Sale (Detail)

v3.25.2
Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 994,611 $ 1,004,563
Gross Unrealized Gain 2,737 901
Gross Unrealized Loss (79,254) (99,666)
Estimated Fair Value 918,094 905,798
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 119,908 89,208
Gross Unrealized Gain 236 242
Gross Unrealized Loss (323) (521)
Estimated Fair Value 119,821 88,929
Mortgage-backed securities - residential    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 434,588 453,993
Gross Unrealized Gain 549 222
Gross Unrealized Loss (47,105) (61,643)
Estimated Fair Value 388,032 392,572
Mortgage-backed securities - commercial    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 73,295 75,947
Gross Unrealized Gain 85 24
Gross Unrealized Loss (12,030) (13,055)
Estimated Fair Value 61,350 62,916
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 203,969 182,553
Gross Unrealized Gain 1,861 404
Gross Unrealized Loss (7,176) (9,401)
Estimated Fair Value 198,654 173,556
Debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 87,287 126,776
Gross Unrealized Gain 6 9
Gross Unrealized Loss (2,133) (3,969)
Estimated Fair Value 85,160 122,816
Total U.S. government agency and sponsored agency obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 799,139 839,269
Gross Unrealized Gain 2,501 659
Gross Unrealized Loss (68,444) (88,068)
Estimated Fair Value 733,196 751,860
Municipal bonds-tax exempt    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 75,564 76,086
Gross Unrealized Loss (10,487) (11,077)
Estimated Fair Value $ 65,077 $ 65,009