CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INTEREST INCOME
Interest and fees on loans	$ 470,144	$ 359,308	$ 305,553
Interest and dividends on securities:
Taxable	23,793	18,089	15,838
Tax-exempt	9,541	13,360	8,752
Other interest income	9,188	6,110	5,107
Total interest income	512,666	396,867	335,250
INTEREST EXPENSE
Interest on time deposits	42,093	22,213	17,191
Interest on other deposits	58,354	27,486	18,255
Interest on borrowed funds	24,478	20,952	20,365
Total interest expense	124,925	70,651	55,811
Net interest income	387,741	326,216	279,439
Provision for credit losses	12,700	9,735	49,348
Net interest income after provision for credit losses	375,041	316,481	230,091
NONINTEREST INCOME
Investment advisory revenue	21,347	20,517	18,811
Trust services revenue	17,760	19,264	16,109
Credit related fees	16,124	12,166	10,729
Service charges on deposit accounts	15,432	15,272	13,793
Other service fees	5,345	4,414	2,884
Mortgage banking income	2,372	3,731	4,663
Securities (losses) gains, net	(1,853)	(146)	3,736
Other income	18,111	24,656	17,678
Total noninterest income	94,638	99,874	88,403
NONINTEREST EXPENSE
Salaries and employee benefits	154,905	139,118	125,068
Premises and equipment	30,478	28,921	27,982
Merger related expenses	2,983
Intangible asset amortization	2,755	4,652	6,532
Other expense	67,180	60,665	60,598
Total noninterest expense	258,301	233,356	220,180
Income before income taxes	211,378	182,999	98,314
Income tax expense	45,117	80,646	32,540
Net income	$ 166,261	$ 102,353	$ 65,774
Weighted average common shares outstanding (Basic)	83,562,109	81,072,945	75,000,000
Weighted average common shares outstanding (Diluted)	84,375,289	81,605,015	75,294,600
Earnings per common share (Basic)	$ 1.99	$ 1.26	$ 0.88
Earnings per common share (Diluted)	$ 1.97	$ 1.25	$ 0.87