CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest on securities
Taxable	$ 37,860	$ 34,442	$ 26,133
Nontaxable	884	913	1,036
Interest and fees on loans	199,984	153,825	119,217
Interest on federal funds sold and other investments	2,670	2,416	1,669
Total Interest Income	241,398	191,596	148,055
Interest Expense
Interest on savings deposits	8,763	3,654	2,593
Interest on time certificates	11,684	4,678	2,074
Interest on federal funds purchased and other short term borrowings	1,804	781	484
Interest on Federal Home Loan Bank borrowings	4,468	3,744	1,256
Interest on subordinated debt	3,164	2,443	2,060
Total Interest Expense	29,883	15,300	8,467
Net Interest Income	211,515	176,296	139,588
Provision for loan losses	11,730	5,648	2,411
Net Interest Income After Provision for Loan Losses	199,785	170,648	137,177
Noninterest Income (Note M)
Gain on sale of Visa stock	0	15,153	0
Securities (losses) gains, net (includes net losses of ($96) for 2018, net gains of $1,950 for 2017, and net losses of ($617) for 2016 in other comprehensive income reclassifications)	(623)	86	368
Other	50,645	43,230	37,427
Total Noninterest Income	50,022	58,469	37,795
Noninterest Expense (Note M)	162,273	149,916	130,881
Income Before Income Taxes	87,534	79,201	44,091
Income taxes	20,259	36,336	14,889
Net Income	$ 67,275	$ 42,865	$ 29,202
Net income per share of common stock
Diluted (in dollars per share)	$ 1.38	$ 0.99	$ 0.78
Basic (in dollars per share)	$ 1.40	$ 1.01	$ 0.79
Average common shares outstanding
Diluted (in shares)	48,747,911	43,350,314	37,508,046
Basic (in shares)	47,968,942	42,613,086	36,872,007