Consolidated Balance Sheets - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
ASSETS
CASH AND DUE FROM BANKS	$ 224,875,000	$ 293,286,000	$ 203,187,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	221,336,000	37,392,000	394,566,000
Total cash and cash equivalents	446,211,000	330,678,000	597,753,000
SECURITIES AVAILABLE-FOR-SALE, at fair value (amortized cost of these securities was $5,879,040, $6,767,967and $6,152,348 as ofMarch 31, 2023 and 2022, and December 31, 2022, respectively)	5,298,557,000	5,474,359,000	6,502,495,000
LOANS:
Held-for-investment, excluding PPP loans	6,576,060,000	6,441,699,000	5,550,430,000
PPP loans	155,000	169,000	15,739,000
Total loans held-for-investment	6,576,215,000	6,441,868,000	5,566,169,000
Less: Allowance for credit losses	(80,818,000)	(75,834,000)	(66,913,000)
Net loans held for investment	6,495,397,000	6,366,034,000	5,499,256,000
Held-for-sale ($11,766, $22,382 and $10,497at fair value at March 31, 2023 and 2022, and December 31, 2022, respectively)	11,996,000	11,965,000	27,670,000
BANK PREMISES AND EQUIPMENT, net	153,718,000	152,973,000	150,168,000
INTANGIBLE ASSETS, net	315,306,000	315,534,000	316,459,000
OTHER ASSETS	286,801,000	322,523,000	220,399,000
Total assets	13,007,986,000	12,974,066,000	13,314,200,000
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	3,890,991,000	4,061,788,000	3,978,724,000
INTEREST-BEARING DEPOSITS	7,045,427,000	6,943,719,000	7,021,101,000
Total deposits	10,936,418,000	11,005,507,000	10,999,825,000
DIVIDENDS PAYABLE	24,274,000	24,278,000	21,411,000
BORROWINGS	632,927,000	642,507,000	758,595,000
OTHER LIABILITIES	41,514,000	36,037,000	45,620,000
Total liabilities	11,635,133,000	11,708,329,000	11,825,451,000
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
COMMON STOCK - ($0.01 par value, authorized 200,000,000 shares; 142703,531 and 142,704,495,142,532,116 shares issued at , March 31, 2023 and 2022, and December 31, 2022, respectiveley	1,427,000	1,427,000	1,427,000
CAPITAL SURPLUS	679,429,000	677,593,000	680,665,000
RETAINED EARNINGS	1,150,246,000	1,121,945,000	1,016,239,000
TREASURY STOCK (shares at cost: 927,789, 937,847 and 929,210 at March 31, 2023 and 2022, and December 31, 2022, respectively)	(11,271,000)	(11,035,000)	(10,404,000)
DEFERRED COMPENSATION	11,271,000	11,035,000	10,404,000
ACCUMULATED OTHER COMPREHENSIVE EARNINGS (LOSS), net	(458,249,000)	(535,228,000)	(209,582,000)
Total shareholders' equity	1,372,853,000	1,265,737,000	1,488,749,000
Total liabilities and shareholders' equity	$ 13,007,986,000	$ 12,974,066,000	$ 13,314,200,000