Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
INTEREST INCOME
Loans, including fees	$ 638,595	$ 656,077	$ 737,932
Investment securities:
Taxable	55,351	58,173	62,556
Tax-exempt	24,470	21,047	14,218
Loans held for sale	1,302	2,077	1,351
Other interest income	3,694	5,504	9,249
Total Interest Income	723,412	742,878	825,306
INTEREST EXPENSE
Deposits	30,005	70,046	131,775
Short-term borrowings	583	5,227	14,543
Long-term borrowings	29,094	38,398	30,599
Total Interest Expense	59,682	113,671	176,917
Net Interest Income	663,730	629,207	648,389
Provision for credit losses	(14,600)	76,920	32,825
Net Interest Income After Provision for Credit Losses	678,330	552,287	615,564
NON-INTEREST INCOME
Non-interest income before investment securities gains	240,229	226,335	211,427
Investment securities gains, net	33,516	3,053	4,733
Total Non-Interest Income	273,745	229,388	216,160
NON-INTEREST EXPENSE
Salaries and employee benefits	329,138	324,395	311,934
Data processing and software	56,440	48,073	44,679
Net occupancy	53,799	53,013	52,826
Other outside services	34,194	31,432	39,989
Debt extinguishment	33,249	2,878	4,326
State taxes	18,793	12,613	8,894
Equipment	13,807	13,885	13,575
FDIC insurance	10,665	8,865	7,780
Professional fees	9,647	12,835	13,134
Amortization of TCI	6,187	6,126	6,021
Marketing	5,275	5,127	9,848
Intangible amortization	589	529	1,427
Other	46,047	59,669	53,303
Total Non-Interest Expense	617,830	579,440	567,736
Income Before Income Taxes	334,245	202,235	263,988
Income taxes	58,748	24,195	37,649
Net Income	275,497	178,040	226,339
Preferred stock dividends	(10,277)	(2,135)	0
Net Income Available to Common Shareholders	$ 265,220	$ 175,905	$ 226,339
PER SHARE:
Net income available to common shareholders (basic) (in dollars per share)	$ 1.63	$ 1.08	$ 1.36
Net income available to common shareholders (diluted) (in dollars per share)	1.62	1.08	1.35
Cash Dividends (in dollars per share)	$ 0.64	$ 0.56	$ 0.56
Commercial banking
NON-INTEREST INCOME
Non-interest income before investment securities gains	$ 68,689	$ 70,286	$ 71,117
Consumer banking
NON-INTEREST INCOME
Non-interest income before investment securities gains	45,544	41,598	49,503
Wealth management
NON-INTEREST INCOME
Non-interest income before investment securities gains	71,798	59,058	55,678
Mortgage banking
NON-INTEREST INCOME
Non-interest income before investment securities gains	33,576	42,309	23,099
Other
NON-INTEREST INCOME
Non-interest income before investment securities gains	$ 20,622	$ 13,084	$ 12,030