Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
INTEREST INCOME
Loans, including fees	$ 70,990	$ 65,604	$ 139,720	$ 128,523
Securities:
Taxable	3,855	1,956	8,190	3,854
Tax-exempt	118	162	244	333
Federal funds sold		95	2	199
Interest-bearing deposits with banks	8,135	7,325	15,883	13,107
Total interest income	83,098	75,142	164,039	146,016
INTEREST EXPENSE
Deposits	13,802	9,710	27,339	16,979
Short-term borrowings	12	8	22	43
Junior subordinated debentures	492	544	983	1,079
Total interest expense	14,306	10,262	28,344	18,101
Net interest income	68,792	64,880	135,695	127,915
Provision for loan losses	2,433	1,225	4,117	1,539
Net interest income after provision for loan losses	66,359	63,655	131,578	126,376
NONINTEREST INCOME
Securities transactions (includes no accumulated other comprehensive income reclassifications)	821	115	821	101
Income from sales of loans	868	802	1,566	1,453
Insurance commissions	4,420	3,927	9,685	9,126
Cash management	4,402	3,381	8,178	6,402
(Loss)/gain on sale of other assets	(7)	127	(11)	153
Other	1,209	1,152	2,635	2,597
Total noninterest income	34,077	30,437	66,078	60,547
NONINTEREST EXPENSE
Salaries and employee benefits	36,124	34,776	72,295	68,966
Occupancy, net	2,953	3,396	5,580	6,798
Depreciation	3,015	2,429	6,000	4,839
Amortization of intangible assets	758	759	1,517	1,492
Data processing services	1,262	1,195	2,742	2,398
Net expense/(income) from other real estate owned	97	19	(387)	45
Marketing and business promotion	1,919	1,649	4,180	4,001
Deposit insurance	544	640	1,077	1,259
Other	9,936	9,393	19,810	20,348
Total noninterest expense	56,608	54,256	112,814	110,146
Income before taxes	43,828	39,836	84,842	76,777
Income tax expense	9,661	9,250	18,838	16,571
Net income	$ 34,167	$ 30,586	$ 66,004	$ 60,206
NET INCOME PER COMMON SHARE
Basic	$ 1.04	$ 0.93	$ 2.02	$ 1.84
Diluted	$ 1.02	$ 0.91	$ 1.98	$ 1.80
OTHER COMPREHENSIVE GAIN/(LOSS)
Unrealized gains/(losses) on securities, net of tax of $(1,112), $179, $(1,980) and $653, respectively	$ 3,254	$ (541)	$ 5,794	$ (1,929)
Other comprehensive gains/(losses), net of tax of $(1,112), $179, $(1,980) and $653, respectively	3,254	(541)	5,794	(1,929)
Comprehensive income	37,421	30,045	71,798	58,277
Trust Revenue [Member]
NONINTEREST INCOME
Revenue	3,250	3,396	6,427	6,525
Service Charges on Deposits [Member]
NONINTEREST INCOME
Revenue	$ 19,114	$ 17,537	$ 36,777	$ 34,190