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Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial Assets
Cash and due from banks	$ 408,411	$ 1,251,358
Equity securities	11,506	13,466
Available-for-sale debt securities	2,529,140	3,013,462
Held-to-maturity debt securities	1,248,629	1,004,823
Loans held for sale	8,249	25,277
Accrued interest receivable	68,522	60,844
Financial Liabilities
Deposits	13,131,090	13,565,863
Federal Home Loan Bank borrowings	705,000	183,920
Other borrowings	135,069	141,893
Junior subordinated debt	133,530
Subordinated debt and junior subordinated debt	281,404	132,860
Accrued interest payable	4,593	1,901
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets
Cash and due from banks	408,411	1,251,358
Equity securities	11,506	13,466
Accrued interest receivable	68,522	60,844
Financial Liabilities
Deposits	12,245,272	12,273,211
Other borrowings	122,926	134,288
Accrued interest payable	4,593	1,901
Significant Other Observable Inputs (Level 2) [Member]
Financial Assets
Available-for-sale debt securities	2,527,961	3,011,969
Held-to-maturity debt securities	1,084,071	1,028,047
Loans held for sale	8,249	25,277
Other assets—interest rate derivatives	75,840	24,867
Financial Liabilities
Deposits	897,671	1,302,266
Federal Home Loan Bank borrowings	705,094	185,684
Subordinated debt and junior subordinated debt	258,631	109,186
Other liabilities—interest rate derivatives	74,683	26,388
Significant Unobservable Inputs (Level 3) [Member]
Financial Assets
Available-for-sale debt securities	1,179	1,493
Held-to-maturity debt securities	319	405
Net loans	9,487,038	9,385,917
Carrying Amount [Member]
Financial Assets
Cash and due from banks	408,411	1,251,358
Equity securities	11,506	13,466
Available-for-sale debt securities	2,529,140	3,013,462
Held-to-maturity debt securities	1,248,409	1,004,555
Net loans	10,584,938	9,611,856
Loans held for sale	8,249	25,277
Other assets—interest rate derivatives	75,840	24,867
Accrued interest receivable	68,522	60,844
Financial Liabilities
Deposits	13,131,090	13,565,863
Federal Home Loan Bank borrowings	705,000	183,920
Other borrowings	135,069	141,893
Subordinated debt and junior subordinated debt	281,404	132,860
Other liabilities—interest rate derivatives	74,683	26,388
Accrued interest payable	4,593	1,901
Fair Value Estimate [Member]
Financial Assets
Cash and due from banks	408,411	1,251,358
Equity securities	11,506	13,466
Available-for-sale debt securities	2,529,140	3,013,462
Held-to-maturity debt securities	1,084,390	1,028,452
Net loans	9,487,038	9,385,917
Loans held for sale	8,249	25,277
Other assets—interest rate derivatives	75,840	24,867
Accrued interest receivable	68,522	60,844
Financial Liabilities
Deposits	13,142,943	13,575,477
Federal Home Loan Bank borrowings	705,094	185,684
Other borrowings	122,926	134,288
Subordinated debt and junior subordinated debt	258,631	109,186
Other liabilities—interest rate derivatives	74,683	26,388
Accrued interest payable	$ 4,593	$ 1,901

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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