FAIR VALUE - Carrying Amounts and Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial assets:
Residential mortgage loans held for sale	$ 11,706	$ 39,409
Investments available-for-sale	1,214,538	1,465,896
Investments held-to-maturity (at fair value)	220,123	0
Loans, net of allowance	11,260,464	9,857,946
Accrued interest receivable	41,172	34,349
Financial liabilities:
Time deposits	2,118,262
Other deposits	10,953,421	10,624,731
Securities sold under retail repurchase agreements and federal funds purchased	321,967	141,086
Advances from FHLB	550,000	0
Subordinated debt	370,205	172,712
Carrying Amount
Financial assets:
Cash and cash equivalents	192,232	420,020
Residential mortgage loans held for sale	11,706	39,409
Investments available-for-sale	1,214,538	1,465,896
Investments held-to-maturity (at fair value)	259,452
Other investments	69,218	41,166
Loans, net of allowance	11,260,464	9,857,946
Interest rate swap agreements	18,596	5,880
Accrued interest receivable	41,172	34,349
Bank owned life insurance	153,016	147,528
Financial liabilities:
Time deposits	2,118,262	1,290,862
Other deposits	8,835,159	9,333,869
Securities sold under retail repurchase agreements and federal funds purchased	321,967	141,086
Advances from FHLB	550,000	0
Subordinated debt	370,205	172,712
Interest rate swap agreements	18,596	5,880
Accrued interest payable	10,867	1,516
Estimated Fair Value
Financial assets:
Cash and cash equivalents	192,232	420,020
Residential mortgage loans held for sale	11,706	39,409
Investments available-for-sale	1,214,538	1,465,896
Investments held-to-maturity (at fair value)	220,123
Other investments	69,218	41,166
Loans, net of allowance	11,020,992	9,964,924
Interest rate swap agreements	18,596	5,880
Accrued interest receivable	41,172	34,349
Bank owned life insurance	153,016	147,528
Financial liabilities:
Time deposits	2,082,319	1,292,598
Other deposits	8,835,159	9,333,869
Securities sold under retail repurchase agreements and federal funds purchased	321,967	141,086
Advances from FHLB	549,530	0
Subordinated debt	332,470	175,780
Interest rate swap agreements	18,596	5,880
Accrued interest payable	10,867	1,516
Quoted Prices in Active Markets for Identical Assets (Level 1) | Estimated Fair Value
Financial assets:
Cash and cash equivalents	192,232	420,020
Residential mortgage loans held for sale	0	0
Investments available-for-sale	0	0
Investments held-to-maturity (at fair value)	0
Other investments	0	0
Loans, net of allowance	0	0
Interest rate swap agreements	0	0
Accrued interest receivable	41,172	34,349
Bank owned life insurance	0	0
Financial liabilities:
Time deposits	0	0
Other deposits	8,835,159	9,333,869
Securities sold under retail repurchase agreements and federal funds purchased	0	0
Advances from FHLB	0	0
Subordinated debt	0	0
Interest rate swap agreements	0	0
Accrued interest payable	10,867	1,516
Significant Other Observable Inputs (Level 2) | Estimated Fair Value
Financial assets:
Cash and cash equivalents	0	0
Residential mortgage loans held for sale	11,706	39,409
Investments available-for-sale	1,214,538	1,465,896
Investments held-to-maturity (at fair value)	220,123
Other investments	69,218	41,166
Loans, net of allowance	0	0
Interest rate swap agreements	18,596	5,880
Accrued interest receivable	0	0
Bank owned life insurance	153,016	147,528
Financial liabilities:
Time deposits	2,082,319	1,292,598
Other deposits	0	0
Securities sold under retail repurchase agreements and federal funds purchased	321,967	141,086
Advances from FHLB	549,530	0
Subordinated debt	0	0
Interest rate swap agreements	18,596	5,880
Accrued interest payable	0	0
Significant Unobservable Inputs (Level 3) | Estimated Fair Value
Financial assets:
Cash and cash equivalents	0	0
Residential mortgage loans held for sale	0	0
Investments available-for-sale	0	0
Investments held-to-maturity (at fair value)	0
Other investments	0	0
Loans, net of allowance	11,020,992	9,964,924
Interest rate swap agreements	0	0
Accrued interest receivable	0	0
Bank owned life insurance	0	0
Financial liabilities:
Time deposits	0	0
Other deposits	0	0
Securities sold under retail repurchase agreements and federal funds purchased	0	0
Advances from FHLB	0	0
Subordinated debt	332,470	175,780
Interest rate swap agreements	0	0
Accrued interest payable	$ 0	$ 0