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FAIR VALUE DISCLOSURES - Estimated Fair Values of Financial Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Financial assets    
Investment securities held-to-maturity $ 84,021 $ 98,420
Other investments 143,160 102,971
Loans held for sale 7,900 29,500
Interest Receivable 47,488 29,500
Deposits    
Noninterest-bearing 4,135,180 4,185,572
Savings 3,828,139 4,157,374
Time 1,700,705 1,330,263
Deposits 12,701,177 12,871,954
Impaired Commercial And Commercial Real Estate Loans Member    
Deposits    
Principal Amount of Commercial and Commercial Real Estate Loans 11,900 28,800
Allowance for Loan and Lease Losses, Real Estate 3,700 9,700
Carrying value    
Financial assets    
Cash and short-term investments 595,683 434,842
Investment securities held-to-maturity 84,021 98,420
Other investments 143,160 102,971
Loans and leases 10,165,994 9,156,307
Interest Receivable 63,721 44,627
Deposits    
Deposits 12,701,177 12,871,954
Short-term borrowings 1,287,156 296,203
Long-term debt 346,672 409,832
Interest Payable 11,150 4,498
Fair value    
Financial assets    
Cash and short-term investments 595,683 434,842
Investment securities held-to-maturity 76,485 99,898
Other investments 143,160 102,971
Loans and leases 9,916,353 9,172,111
Interest Receivable 63,721 44,627
Deposits    
Deposits 12,670,747 12,869,567
Short-term borrowings 1,287,156 296,203
Long-term debt 348,041 411,569
Interest Payable 11,150 4,498
Fair Value, Inputs, Level 1 [Member] | Fair value    
Financial assets    
Cash and short-term investments 595,683 434,842
Investment securities held-to-maturity 0 0
Other investments 1,171 1,331
Loans and leases 0 0
Interest Receivable 0 0
Deposits    
Deposits 0 0
Short-term borrowings 1,287,156 296,203
Long-term debt 0 0
Interest Payable 3,835 0
Fair Value, Inputs, Level 2 [Member] | Fair value    
Financial assets    
Cash and short-term investments 0 0
Investment securities held-to-maturity 76,485 99,898
Other investments 132,853 92,025
Loans and leases 0 0
Interest Receivable 16,233 15,170
Deposits    
Deposits 12,670,747 12,869,567
Short-term borrowings 0 0
Long-term debt 348,041 411,569
Interest Payable 7,315 4,498
Fair Value, Inputs, Level 3 [Member] | Fair value    
Financial assets    
Cash and short-term investments 0 0
Investment securities held-to-maturity 0 0
Other investments 9,136 9,615
Loans and leases 9,916,353 9,172,111
Interest Receivable   29,457
Deposits    
Deposits 0 0
Short-term borrowings 0 0
Long-term debt 0 0
Interest Payable $ 0 $ 0