Consolidated Balance Sheets - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
ASSETS
CASH AND DUE FROM BANKS	$ 203,187,000	$ 205,053,000	$ 190,350,000
INTEREST-BEARING DEMAND DEPOSITS IN BANKS	394,566,000	323,535,000	893,221,000
Total cash and cash equivalents	597,753,000	528,588,000	1,083,571,000
SECURITIES AVAILABLE-FOR-SALE, at fair value (amortized cost of these securities was $6,767,967, $4,961,438 and $6,447,510 as of March 31, 2022 and 2021 and December 31, 2021, respectively)	6,502,495,000	6,573,179,000	5,109,631,000
LOANS:
Held-for-investment, excluding PPP loans	5,550,430,000	5,336,179,000	4,790,752,000
PPP loans	15,739,000	52,793,000	531,810,000
Total loans held-for-investment	5,566,169,000	5,388,972,000	5,322,562,000
Less—allowance for credit losses	(66,913,000)	(63,465,000)	(62,974,000)
Net loans held for investment	5,499,256,000	5,325,507,000	5,259,588,000
Held-for-sale ($22,382, $61,511 and $34,122 at fair value at March 31, 2022 and 2021 and December 31, 2021, respectively)	27,670,000	37,810,000	65,405,000
BANK PREMISES AND EQUIPMENT, net	150,168,000	149,764,000	142,415,000
INTANGIBLE ASSETS, net	316,459,000	316,779,000	317,980,000
OTHER ASSETS	220,399,000	170,834,000	124,297,000
Total assets	13,314,200,000	13,102,461,000	12,102,887,000
LIABILITIES AND SHAREHOLDERS' EQUITY
NONINTEREST-BEARING DEPOSITS	3,978,724,000	3,780,230,000	3,350,145,000
INTEREST-BEARING DEPOSITS	7,021,101,000	6,786,258,000	6,063,302,000
Total deposits	10,999,825,000	10,566,488,000	9,413,447,000
DIVIDENDS PAYABLE	21,411,000	21,388,000	18,500,000
BORROWINGS	758,595,000	671,152,000	548,604,000
TRADE DATE PAYABLE	0	0	381,871,000
OTHER LIABILITIES	45,620,000	84,209,000	75,037,000
Total liabilities	11,825,451,000	11,343,237,000	10,437,459,000
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY:
COMMON STOCK - ($0.01 par value, authorized 200,000,000 shares; 142,704,495, 142,285,611 and 142,532,116 shares issued at March 31, 2022 and 2021 and December 31, 2021, respectively)	1,427,000	1,425,000	1,423,000
CAPITAL SURPLUS	680,665,000	676,871,000	671,849,000
RETAINED EARNINGS	1,016,239,000	981,675,000	875,147,000
TREASURY STOCK (shares at cost: 936,847, 938,004 and 936,897 at March 31, 2022 and 2021 and December 31, 2021, respectively)	(10,404,000)	(10,090,000)	(9,385,000)
DEFERRED COMPENSATION	10,404,000	10,090,000	9,385,000
ACCUMULATED OTHER COMPREHENSIVE EARNINGS (LOSS), net	(209,582,000)	99,253,000	117,009,000
Total shareholders' equity	1,488,749,000	1,759,224,000	1,665,428,000
Total liabilities and shareholders' equity	$ 13,314,200,000	$ 13,102,461,000	$ 12,102,887,000