CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Interest and fees on loans	$ 62,287	$ 45,257
Interest and dividends on securities	9,270	9,604
Interest on interest bearing deposits and other investments	918	616
Total Interest Income	72,475	55,477
Interest on deposits	3,873	1,538
Interest on time certificates	4,959	2,179
Interest on borrowed money	2,869	1,998
Total Interest Expense	11,701	5,715
Net Interest Income	60,774	49,762
Provision for loan losses	1,397	1,085
Net Interest Income after Provision for Loan Losses	59,377	48,677
Noninterest income
Other income	12,845	12,398
Securities losses, net	(9)	(102)
Total Noninterest Income (Note I)	12,836	12,296
Total Noninterest Expenses (Note I)	43,099	37,164
Income Before Income Taxes	29,114	23,809
Provision for income taxes	6,409	5,782
Net Income	$ 22,705	$ 18,027
Share Data
Net income per share of common stock - diluted (in dollars per share)	$ 0.44	$ 0.38
Net income per share of common stock - basic (in dollars per share)	$ 0.44	$ 0.38
Average common shares outstanding - diluted (in shares)	52,039	47,688
Average shares outstanding - basic (in shares)	51,359	46,952