Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
INTEREST INCOME:
Interest and fees on loans	$ 39,942	$ 36,034	$ 80,289	$ 71,095
Interest on investment securities:
Taxable	7,130	7,399	14,392	15,207
Exempt from federal income tax	10,745	9,861	21,411	18,981
Interest on federal funds sold and interest-bearing deposits in banks	64	50	124	130
Total interest income	57,881	53,344	116,216	105,413
INTEREST EXPENSE:
Interest on deposits	1,033	902	2,086	1,829
Other	297	106	556	148
Total interest expense	1,330	1,008	2,642	1,977
Net interest income	56,551	52,336	113,574	103,436
PROVISION FOR LOAN LOSSES	2,058	1,554	4,386	2,844
Net interest income after provision for loan losses	54,493	50,782	109,188	100,592
NONINTEREST INCOME:
Trust fees	4,726	4,740	9,380	9,472
Service charges on deposit accounts	4,404	4,021	8,818	7,789
ATM, interchange and credit card fees	5,840	5,445	11,521	10,415
Real estate mortgage operations	4,013	2,098	7,153	3,580
Net gain on sale of available-for-sale securities (includes $912 and $239 for the three months ended June 30, 2016 and 2015, respectively, and $914 and $244 for the six months ended June 30, 2016 and 2015, respectively, related to accumulated other comprehensive earnings reclassifications)	912	239	914	244
Net gain (loss) on sale of foreclosed assets	278	(49)	353	(19)
Net gain (loss) on sale of assets	(74)	(4)	439	1
Interest on loan recoveries	629	403	1,261	510
Other	710	916	1,419	1,715
Total noninterest income	21,438	17,809	41,258	33,707
NONINTEREST EXPENSE:
Salaries and employee benefits	22,147	19,173	44,737	37,438
Net occupancy expense	2,583	2,394	5,214	4,590
Equipment expense	3,386	2,992	6,766	5,891
FDIC insurance premiums	818	749	1,642	1,498
ATM, interchange and credit card expenses	1,806	1,609	3,492	3,335
Professional and service fees	1,650	1,157	3,215	2,222
Printing, stationery and supplies	464	471	967	1,067
Amortization of intangible assets	199	72	398	162
Other	7,703	6,587	15,405	12,948
Total noninterest expense	40,756	35,204	81,836	69,151
EARNINGS BEFORE INCOME TAXES	35,175	33,387	68,610	65,148
INCOME TAX EXPENSE (includes $319 and $84 for the three months ended June 30, 2016 and 2015, respectively, and $320 and $85 for the six months ended June 30, 2016 and 2015, respectively, related to income tax expense from reclassification items)	8,366	8,080	16,105	15,845
NET EARNINGS	$ 26,809	$ 25,307	$ 52,505	$ 49,303
EARNINGS PER SHARE, BASIC	$ 0.41	$ 0.39	$ 0.80	$ 0.77
EARNINGS PER SHARE, ASSUMING DILUTION	0.41	0.39	0.79	0.77
DIVIDENDS PER SHARE	$ 0.18	$ 0.16	$ 0.34	$ 0.30