CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans receivable:
Taxable	$ 338,009	$ 358,264	$ 382,772
Tax-exempt	22,110	21,483	17,568
Investment securities:
Taxable	29,951	24,440	27,815
Tax-exempt	55,331	42,341	31,655
Deposits with financial institutions	634	938	4,225
Federal Home Loan Bank stock	597	1,042	1,370
Total Interest Income	446,632	448,508	465,405
INTEREST EXPENSE
Deposits	23,319	51,740	91,585
Federal funds purchased	5	120	251
Securities sold under repurchase agreements	314	604	1,424
Federal Home Loan Bank advances	5,672	6,973	7,176
Subordinated debentures and term loans	6,642	6,944	8,309
Total Interest Expense	35,952	66,381	108,745
NET INTEREST INCOME	410,680	382,127	356,660
Provision for credit losses - loans	0	58,673	2,800
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	410,680	323,454	353,860
OTHER INCOME
Net gains and fees on sales of loans	19,689	18,271	7,891
Increase in cash surrender value of life insurance	4,873	5,040	4,518
Gains on life insurance benefits	2,187	100	19
Net realized gains on sales of available for sale securities	5,674	11,895	4,415
Other income	3,008	1,898	2,068
Total Other Income	109,323	109,926	86,688
OTHER EXPENSES
Salaries and employee benefits	166,995	155,937	144,037
Net occupancy	23,326	26,756	19,584
Equipment	19,401	19,344	16,218
Marketing	5,762	6,609	6,650
Outside data processing fees	18,317	14,432	16,476
Printing and office supplies	1,217	1,304	1,445
Intangible asset amortization	5,747	5,987	5,994
FDIC assessments	6,243	5,804	717
Other real estate owned and foreclosure expenses	992	330	2,428
Professional and other outside services	11,913	8,901	15,410
Other expenses	19,300	18,001	17,804
Total Other Expenses	279,213	263,405	246,763
INCOME BEFORE INCOME TAX	240,790	169,975	193,785
Income tax expense	35,259	21,375	29,325
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 205,531	$ 148,600	$ 164,460
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS PER SHARE DATA:
Basic (in dollars per share)	$ 3.82	$ 2.75	$ 3.20
Diluted (in dollars per share)	$ 3.81	$ 2.74	$ 3.19
Service charges on deposit accounts
OTHER INCOME
Other income	$ 23,571	$ 20,999	$ 22,951
Fiduciary and wealth management fees
OTHER INCOME
Other income	28,362	23,747	17,562
Card payment fees
OTHER INCOME
Other income	16,619	19,502	20,243
Derivative hedge fees
OTHER INCOME
Other income	3,850	6,977	5,357
Other customer fees
OTHER INCOME
Other income	$ 1,490	$ 1,497	$ 1,664