Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest Income
Investment securities	$ 86,499	$ 81,968	$ 90,392
Residential real estate loans	40,041	33,114	33,410
Commercial loans	304,164	227,356	188,949
Consumer and other loans	38,292	32,584	31,402
Total interest income	468,996	375,022	344,153
Interest Expense
Deposits	18,359	16,793	18,402
Securities sold under agreements to repurchase	2,248	1,858	1,207
Federal Home Loan Bank advances	8,880	6,748	6,221
Other borrowed funds	95	79	67
Subordinated debentures	5,949	4,386	3,734
Total interest expense	35,531	29,864	29,631
Net Interest Income	433,465	345,158	314,522
Provision for loan losses	9,953	10,824	2,333
Net interest income after provision for loan losses	423,512	334,334	312,189
Non-Interest Income
Service charges and other fees	74,887	67,717	62,405
Miscellaneous loan fees and charges	6,805	4,360	4,613
Gain on sale of loans	27,134	30,439	33,606
Loss on sale of debt securities	(1,113)	(660)	(1,463)
Other income	11,111	10,383	8,157
Total non-interest income	118,824	112,239	107,318
Non-Interest Expense
Compensation and employee benefits	195,056	160,506	151,697
Occupancy and equipment	30,734	26,631	25,979
Advertising and promotions	9,566	8,405	8,433
Data processing	15,911	14,150	14,390
Other real estate owned	3,221	1,909	2,895
Regulatory assessments and insurance	5,075	4,431	4,780
Core deposit intangible amortization	6,270	2,494	2,970
Other expense	54,294	47,045	47,570
Total non-interest expense	320,127	265,571	258,714
Income Before Income Taxes	222,209	181,002	160,793
Federal and state income tax expense	40,331	64,625	39,662
Net Income	$ 181,878	$ 116,377	$ 121,131
Basic earnings per share	$ 2.18	$ 1.50	$ 1.59
Diluted earnings per share	2.17	1.50	1.59
Dividends declared per share	$ 1.31	$ 1.14	$ 1.10
Average outstanding shares - basic	83,603,515	77,537,664	76,278,463
Average outstanding shares - diluted	83,677,185	77,607,605	76,341,836