CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Interest and fees on loans	$ 60,487	$ 63,092	$ 188,771	$ 187,667
Interest and dividends on securities	7,097	8,933	23,609	27,279
Interest on interest bearing deposits and other investments	556	800	1,974	2,591
Total Interest Income	68,140	72,825	214,354	217,537
Interest on deposits	1,299	4,334	5,692	13,032
Interest on time certificates	2,673	6,009	11,261	16,692
Interest on borrowed money	665	1,534	3,449	5,955
Total Interest Expense	4,637	11,877	20,402	35,679
Net Interest Income	63,503	60,948	193,952	181,858
Provision for credit losses	(845)	2,251	36,279	6,199
Net Interest Income after Provision for Credit Losses	64,348	58,697	157,673	175,659
Noninterest income
Other income	16,942	14,790	45,387	41,678
Securities gains (losses), net	4	(847)	1,253	(1,322)
Total Noninterest Income (Note H)	16,946	13,943	46,640	40,356
Total Noninterest Expenses (Note H)	51,674	38,583	141,871	122,682
Income Before Income Taxes	29,620	34,057	62,442	93,333
Provision for income taxes	6,992	8,452	14,025	21,770
Net Income	$ 22,628	$ 25,605	$ 48,417	$ 71,563
Share Data
Net income per share of common stock - diluted (in dollars per share)	$ 0.42	$ 0.49	$ 0.91	$ 1.38
Net income per share of common stock - basic (in dollars per share)	$ 0.42	$ 0.50	$ 0.91	$ 1.39
Average common shares outstanding - diluted (in shares)	54,301	51,935	53,325	51,996
Average common shares outstanding - basic (in shares)	53,978	51,473	52,926	51,426