CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Interest and fees on loans	$ 64,844	$ 62,288	$ 128,284	$ 124,575
Interest and dividends on securities	7,694	9,076	16,512	18,346
Interest on interest bearing deposits and other investments	684	873	1,418	1,791
Total Interest Income	73,222	72,237	146,214	144,712
Interest on deposits	1,203	4,825	4,393	8,698
Interest on time certificates	3,820	5,724	8,588	10,683
Interest on borrowed money	927	1,552	2,784	4,421
Total Interest Expense	5,950	12,101	15,765	23,802
Net Interest Income	67,272	60,136	130,449	120,910
Provision for credit losses	7,611	2,551	37,124	3,948
Net Interest Income after Provision for Credit Losses	59,661	57,585	93,325	116,962
Noninterest income
Other income	13,776	14,043	28,445	26,888
Securities gains (losses), net	1,230	(466)	1,249	(475)
Total Noninterest Income (Note H)	15,006	13,577	29,694	26,413
Total Noninterest Expenses (Note H)	42,399	41,000	90,197	84,099
Income Before Income Taxes	32,268	30,162	32,822	59,276
Provision for income taxes	7,188	6,909	7,033	13,318
Net Income	$ 25,080	$ 23,253	$ 25,789	$ 45,958
Share Data
Net income per share of common stock - diluted (in dollars per share)	$ 0.47	$ 0.45	$ 0.49	$ 0.88
Net income per share of common stock - basic (in dollars per share)	$ 0.47	$ 0.45	$ 0.49	$ 0.89
Average common shares outstanding - diluted (in shares)	53,308	51,952	52,807	51,998
Average common shares outstanding - basic (in shares)	52,985	51,446	52,394	51,403