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Fair Value Information - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Total cash and cash equivalents | $ 203,461 | $ 1,732,548
Investment securities available-for-sale | 3,255,211 | 3,183,923
Investment securities held-to-maturity | 2,554,301 | 1,925,970
Total loans, net of allowance for credit losses | 8,994,275 | 7,822,694
Derivative Asset | 82 | 14,163
Deposits: |  |
Interest-bearing | 4,671,881 | 4,872,386
Financial liabilities, Net Amounts Presented in the Consolidated Balance Sheets | 565,513 | 656,551
Carrying Value [Member] |  |
Assets |  |
Total cash and cash equivalents | 203,461 | 1,732,548
Interest-earning balances due from depository institutions | 9,553 | 25,999
Investment securities available-for-sale | 3,255,211 | 3,183,923
Investment securities held-to-maturity | 2,554,301 | 1,925,970
Total loans, net of allowance for credit losses | 8,994,275 | 7,822,694
Derivative Asset | 82 | 14,163
Deposits: |  |
Interest-bearing | 4,671,881 | 4,872,386
Borrowings | 1,560,431 | 644,669
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Consolidated Balance Sheets | 82 | 14,163
Estimated Fair Value [Member] |  |
Assets |  |
Total cash and cash equivalents | 203,461 | 1,732,548
Interest-earning balances due from depository institutions | 9,553 | 25,999
Investment securities available-for-sale | 3,255,211 | 3,183,923
Investment securities held-to-maturity | 2,155,587 | 1,921,693
Total loans, net of allowance for credit losses | 8,074,952 | 7,696,210
Derivative Asset | 82 | 14,163
Deposits: |  |
Interest-bearing | 4,664,657 | 4,871,531
Borrowings | 1,444,659 | 586,645
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Consolidated Balance Sheets | 82 | 14,163
Estimated Fair Value [Member] | Level 1 [Member] |  |
Assets |  |
Total cash and cash equivalents | 203,461 | 1,732,548
Interest-earning balances due from depository institutions | 0 | 0
Investment securities available-for-sale | 0 | 0
Investment securities held-to-maturity | 0 | 0
Total loans, net of allowance for credit losses | 0 | 0
Derivative Asset | 0 | 0
Deposits: |  |
Interest-bearing | 0 | 0
Borrowings | 0 | 0
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Consolidated Balance Sheets | 0 | 0
Estimated Fair Value [Member] | Level 2 [Member] |  |
Assets |  |
Total cash and cash equivalents | 0 | 0
Interest-earning balances due from depository institutions | 9,553 | 25,999
Investment securities available-for-sale | 3,255,211 | 3,183,923
Investment securities held-to-maturity | 2,155,587 | 1,921,693
Total loans, net of allowance for credit losses | 0 | 0
Derivative Asset | 82 | 14,163
Deposits: |  |
Interest-bearing | 4,664,657 | 4,871,531
Borrowings | 1,444,659 | 586,645
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Consolidated Balance Sheets | 82 | 14,163
Estimated Fair Value [Member] | Level 3 [Member] |  |
Assets |  |
Total cash and cash equivalents | 0 | 0
Interest-earning balances due from depository institutions | 0 | 0
Investment securities available-for-sale | 0 | 0
Investment securities held-to-maturity | 0 | 0
Total loans, net of allowance for credit losses | 8,074,952 | 7,696,210
Derivative Asset | 0 | 0
Deposits: |  |
Interest-bearing | 0 | 0
Borrowings | 0 | 0
Junior subordinated debentures | 0 | 0
Financial liabilities, Net Amounts Presented in the Consolidated Balance Sheets | $ 0 | $ 0

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