CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income:
Loans	$ 1,876,166	$ 1,747,827	$ 1,742,390
Money market investments	118,080	21,147	19,721
Investment securities	471,665	353,663	329,440
Total interest income	2,465,911	2,122,637	2,091,551
Interest expense:
Deposits	252,845	111,621	175,855
Short-term borrowings	5,737	319	2,457
Long-term debt	39,970	53,107	56,626
Total interest expense	298,552	165,047	234,938
Net interest income	2,167,359	1,957,590	1,856,613
Provision for credit losses (benefit)	83,030	(193,464)	292,536
Net interest income after provision for credit losses (benefit)	2,084,329	2,151,054	1,564,077
Mortgage banking activities	42,450	50,133	10,401
Net gain on sale of debt securities	0	23	41
Gain, including impairment on equity securities	(7,334)	131	6,279
Net (loss) profit on trading account debt securities	(784)	(389)	1,033
Net (loss) gain on sale of loans, including valuation adjustments on loans held-for-sale	0	(73)	1,234
Adjustments to indemnity reserves on loans sold	919	4,406	390
Other operating income	370,592	113,951	87,219
Total non-interest income	897,062	642,128	512,312
Operating expenses:
Personnel costs	719,764	631,802	564,205
Net occupancy expenses	106,169	102,226	119,345
Equipment expenses	35,626	32,919	32,514
Other taxes	63,603	56,783	54,454
Professional fees	172,043	126,721	132,414
Technology and software expenses	291,902	277,979	263,886
Processing and transactional services	127,145	121,367	112,039
Communications	14,885	14,029	13,230
Business promotion	88,918	72,981	57,608
FDIC deposit insurance	26,787	25,579	23,868
Other real estate owned (OREO) income	(22,143)	(14,414)	(3,480)
Other operating expenses	109,446	92,169	81,349
Amortization of intangibles	3,275	9,134	6,397
Goodwill impairment charge	9,000	0	0
Total operating expenses	1,746,420	1,549,275	1,457,829
Income before income tax	1,234,971	1,243,907	618,560
Income tax expense	132,330	309,018	111,938
Net Income	1,102,641	934,889	506,622
Net Income Applicable to Common Stock	$ 1,101,229	$ 933,477	$ 504,864
Net Income per Common Share - Basic	$ 14.65	$ 11.49	$ 5.88
Net Income per Common Share - Diluted	$ 14.63	$ 11.46	$ 5.87
Service charges on deposit accounts
Interest expense:
Revenue from contract with customer	$ 157,210	$ 162,698	$ 147,823
Other services
Interest expense:
Revenue from contract with customer	$ 334,009	$ 311,248	$ 257,892