XML 54 R43.htm IDEA: XBRL DOCUMENT v3.23.3
Investment Securities - Summary of Unrealized Loss Positions (Details)
Sep. 30, 2023
USD ($)
loan
Dec. 31, 2022
USD ($)
loan
Investments in an unrealized loss position    
Amount of pretax loss if securities in an unrealized loss position are sold $ 50,500,000  
Allowance for credit losses, continuous unrealized loss position 0  
Investments in an Unrealized Loss Position    
Less than 12 months, fair value 14,612,000 $ 108,486,000
Less than 12 months, unrealized loss (4,020,000) (10,446,000)
12 months or more, fair value 264,302,000 212,317,000
12 months or more, unrealized loss (46,498,000) (39,353,000)
Asset Pledged as Collateral | Public Funds, Repurchase Agreements, and Potential Borrowings    
Investments in an unrealized loss position    
Amortized cost $ 215,600,000 $ 91,300,000
United States government agency securities    
Description and Number of Positions    
Number of investments in an unrealized loss position | loan 25 32
Investments in an Unrealized Loss Position    
Less than 12 months, fair value $ 356,000 $ 21,287,000
Less than 12 months, unrealized loss 0 (1,937,000)
12 months or more, fair value 35,155,000 19,423,000
12 months or more, unrealized loss $ (7,228,000) $ (4,700,000)
United States sponsored mortgage-backed securities    
Description and Number of Positions    
Number of investments in an unrealized loss position | loan 48 51
Investments in an Unrealized Loss Position    
Less than 12 months, fair value $ 2,249,000 $ 6,953,000
Less than 12 months, unrealized loss (90,000) (852,000)
12 months or more, fair value 48,493,000 49,618,000
12 months or more, unrealized loss $ (13,340,000) $ (10,844,000)
United States treasury securities    
Description and Number of Positions    
Number of investments in an unrealized loss position | loan 23 29
Investments in an Unrealized Loss Position    
Less than 12 months, fair value $ 0 $ 11,936,000
Less than 12 months, unrealized loss 0 (130,000)
12 months or more, fair value 98,100,000 102,092,000
12 months or more, unrealized loss $ (8,376,000) $ (9,698,000)
Municipal securities    
Description and Number of Positions    
Number of investments in an unrealized loss position | loan 196 173
Investments in an Unrealized Loss Position    
Less than 12 months, fair value $ 10,036,000 $ 65,930,000
Less than 12 months, unrealized loss (3,828,000) (7,507,000)
12 months or more, fair value 80,624,000 41,184,000
12 months or more, unrealized loss $ (17,484,000) $ (14,111,000)
Corporate debt securities    
Description and Number of Positions    
Number of investments in an unrealized loss position | loan 7 3
Investments in an Unrealized Loss Position    
Less than 12 months, fair value $ 1,971,000 $ 2,380,000
Less than 12 months, unrealized loss (102,000) (20,000)
12 months or more, fair value 1,930,000 0
12 months or more, unrealized loss $ (70,000) $ 0