XML 60 R51.htm IDEA: XBRL DOCUMENT v3.22.2
Investment Securities (Narrative) (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
Security
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Security
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Security
Schedule Of Investments [Line Items]          
Securities pledged as collateral $ 815,800,000   $ 815,800,000   $ 637,600,000
Number of security positions, unrealized loss position | Security 207   207   116
Number of security positions, unrealized loss position for more than 12 months | Security 55   55   28
Securities, 12 months or longer, Fair Value $ 305,309,000   $ 305,309,000   $ 172,180,000
Securities, 12 months or longer, Unrealized Losses $ 49,235,000   $ 49,235,000   $ 4,727,000
Number of security positions, unrealized loss position for less than 12 months | Security 152   152   88
Securities, Less than 12 months, Fair Value $ 750,814,000   $ 750,814,000   $ 773,484,000
Securities, Less than 12 months, Unrealized Losses 77,422,000   77,422,000   10,039,000
Available for sale securities, allowance for credit loss 0   0   0
Securities held to maturity, Amortized Cost 204,938,000   204,938,000   205,586,000
Investment securities, past due 3,710,490,000   3,710,490,000   3,631,355,000
Investment securities, nonaccrual 6,548,000   6,548,000   11,369,000
Total Past Due [Member]          
Schedule Of Investments [Line Items]          
Investment securities, past due 12,392,000   12,392,000   9,467,000
Municipal Bonds [Member]          
Schedule Of Investments [Line Items]          
Securities held to maturity, Amortized Cost 98,600,000   98,600,000   105,600,000
Internally rated held-to-maturity securities 7,400,000   7,400,000   5,800,000
Maximum [Member]          
Schedule Of Investments [Line Items]          
Securities, 12 months or longer, Unrealized Losses 49,200,000   49,200,000   4,700,000
Available for Sale Securities [Member]          
Schedule Of Investments [Line Items]          
Accrued interest receivable 2,200,000   2,200,000   2,100,000
Held To Maturity Investment Securities [Member]          
Schedule Of Investments [Line Items]          
Accrued interest receivable 733,000   733,000   696,000
Held To Maturity Investment Securities [Member] | Total Past Due [Member]          
Schedule Of Investments [Line Items]          
Investment securities, past due 0   0   $ 0
Held To Maturity Investment Securities [Member] | Maximum [Member]          
Schedule Of Investments [Line Items]          
Credit loss expense $ 1,000 $ 1,000 $ 1,000 $ (1,000)