CONSOLIDATED CONDENSED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Loans receivable:
Taxable	$ 87,002	$ 87,312	$ 172,107	$ 183,964
Tax exempt	5,545	5,359	10,884	10,674
Investment securities:
Taxable	7,440	6,147	14,135	13,778
Tax exempt	13,071	10,019	25,456	19,354
Deposits with financial institutions	129	134	243	709
Federal Home Loan Bank stock	88	281	266	580
Total Interest Income	113,275	109,252	223,091	229,059
INTEREST EXPENSE
Deposits	5,823	12,707	12,023	34,455
Federal funds purchased	2	2	4	113
Securities sold under repurchase agreements	75	92	162	444
Federal Home Loan Bank advances	1,452	1,794	2,894	3,568
Subordinated debentures and other borrowings	1,659	1,639	3,316	3,584
Total Interest Expense	9,011	16,234	18,399	42,164
NET INTEREST INCOME	104,264	93,018	204,692	186,895
Provision for credit losses - loans	0	21,895	0	41,647
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	104,264	71,123	204,692	145,248
OTHER INCOME
Net gains and fees on sales of loans	8,325	3,674	12,311	7,037
Increase in cash surrender value of life insurance	1,205	1,231	2,394	2,591
Gains on life insurance benefits	0	95	147	95
Net realized gains on sales of available for sale securities	1,761	3,068	3,560	7,680
Other income	1,017	1,028	1,249	1,293
Total Other Income	30,884	26,481	54,975	56,280
OTHER EXPENSES
Salaries and employee benefits	42,438	35,698	81,249	74,941
Net occupancy	5,615	5,447	12,106	11,248
Equipment	4,848	4,489	9,878	8,833
Marketing	1,122	2,092	2,246	3,535
Outside data processing fees	4,698	2,618	8,942	6,817
Printing and office supplies	313	279	596	666
Amortization of Intangible Assets	1,464	1,511	2,821	3,025
FDIC assessments	1,461	1,472	2,829	2,995
Other real estate owned and foreclosure expenses	178	684	912	1,189
Professional and other outside services	2,976	1,553	5,519	3,811
Other expenses	4,182	4,146	8,295	9,100
Total Other Expenses	69,295	59,989	135,393	126,160
INCOME BEFORE INCOME TAX	65,853	37,615	124,274	75,368
Income tax expense	10,294	4,623	19,246	8,113
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 55,559	$ 32,992	$ 105,028	$ 67,255
Earnings Per Share [Abstract]
Basic Net Income Available to Common Stockholders (in dollars per share)	$ 1.03	$ 0.62	$ 1.95	$ 1.24
Diluted Net Income Available to Common Stockholders (in dollars per share)	1.03	0.62	1.94	1.24
Cash Dividends Paid (in dollars per share)	$ 0.29	$ 0.26	$ 0.55	$ 0.52
Average Diluted Shares Outstanding (in shares)	54,184,424	53,942,567	54,159,332	54,429,519
Service charges on deposit accounts
OTHER INCOME
Other income	$ 5,596	$ 4,312	$ 10,860	$ 10,282
Fiduciary and wealth management fees
OTHER INCOME
Other income	7,510	5,601	13,932	11,586
Card payment fees
OTHER INCOME
Other income	4,159	6,097	8,526	12,004
Derivative hedge fees
OTHER INCOME
Other income	943	1,042	1,260	2,981
Other customer fees
OTHER INCOME
Other income	$ 368	$ 333	$ 736	$ 731