Annual report pursuant to Section 13 and 15(d)

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

v3.22.4
Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 978,796 $ 922,654
Gross Unrealized Gain 63 177
Gross Unrealized Loss (125,021) (12,041)
Estimated Fair Value 853,838 910,790
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 49,690 15,457
Gross Unrealized Gain   1
Gross Unrealized Loss (1,664) (61)
Estimated Fair Value 48,026 15,397
Mortgage-backed securities - residential    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 540,590 558,365
Gross Unrealized Gain 63 15
Gross Unrealized Loss (75,501) (6,449)
Estimated Fair Value 465,152 551,931
Mortgage-backed securities - commercial    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 61,799 57,028
Gross Unrealized Gain   3
Gross Unrealized Loss (10,507) (1,457)
Estimated Fair Value 51,292 55,574
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 98,236 95,153
Gross Unrealized Gain   41
Gross Unrealized Loss (12,751) (1,590)
Estimated Fair Value 85,485 93,604
Debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 150,338 117,499
Gross Unrealized Loss (11,839) (1,603)
Estimated Fair Value 138,499 115,896
Total U.S. government agency and sponsored agency obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 850,963 828,045
Gross Unrealized Gain 63 59
Gross Unrealized Loss (110,598) (11,099)
Estimated Fair Value 740,428 817,005
Municipal bonds-tax exempt    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 78,143 79,152
Gross Unrealized Gain 117
Gross Unrealized Loss (12,759) (881)
Estimated Fair Value $ 65,384 $ 78,388