CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INTEREST INCOME:
Interest and fees on loans	$ 110,566	$ 105,733	$ 317,049	$ 288,171
Interest on securities:
Taxable	18,567	14,433	50,566	38,280
Nontaxable	2,119	3,490	7,766	10,653
Interest on federal funds sold	0	0	4	0
Interest on interest bearing deposits in other financial institutions	2,151	1,238	5,742	2,413
TOTAL INTEREST INCOME	133,403	124,894	381,127	339,517
INTEREST EXPENSE:
Interest on deposits	17,982	10,092	47,333	23,841
Interest on short-term borrowings	250	464	1,477	1,279
Interest on other borrowings (includes $24 and $242 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three months ended September 30, 2019 and 2018, respectively, and $276 and $469 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the nine months ended September 30, 2019 and 2018, respectively)	3,850	3,660	11,333	10,726
TOTAL INTEREST EXPENSE	22,082	14,216	60,143	35,846
NET INTEREST INCOME	111,321	110,678	320,984	303,671
Provision for loan losses	5,201	5,238	11,754	14,332
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	106,120	105,440	309,230	289,339
NONINTEREST INCOME:
Revenue from contract with customers	18,287	18,505	56,771	51,735
Loan servicing income	821	1,670	3,888	5,231
Securities gains/(losses), net (includes $2,013 of net security gains and $(145) of net security losses reclassified from accumulated other comprehensive income for the three months ended September 30, 2019 and 2018, respectively and $7,168 and $1,037 of net security gains reclassified from accumulated other comprehensive income for the nine months ended September 30, 2019 and 2018, respectively)	2,013	(145)	7,168	1,037
Unrealized gain on equity securities, net	144	54	514	97
Net gains on sale of loans held for sale	4,673	7,410	12,192	18,261
Valuation allowance on servicing rights	(626)	230	(1,579)	12
Income on bank owned life insurance	881	892	2,668	2,206
Other noninterest income	3,207	1,149	6,556	3,536
TOTAL NONINTEREST INCOME	29,400	29,765	88,178	82,115
NONINTEREST EXPENSES:
Salaries and employee benefits	50,027	49,921	150,307	149,389
Occupancy	6,594	6,348	19,637	18,706
Furniture and equipment	2,858	3,470	8,770	9,403
Professional fees	12,131	12,800	38,478	32,880
Advertising	2,737	2,754	7,723	6,839
Core deposit intangibles and customer relationship intangibles amortization	2,899	2,626	9,054	6,763
Other real estate and loan collection expenses	(89)	784	774	2,464
(Gain)/loss on sales/valuations of assets, net	356	912	(20,934)	2,243
Restructuring expenses	0	0	3,227	2,564
Other noninterest expenses	15,454	12,924	39,259	33,816
TOTAL NONINTEREST EXPENSES	92,967	92,539	256,295	265,067
INCOME BEFORE INCOME TAXES	42,553	42,666	141,113	106,387
Income taxes (includes $502 and $(26) of income tax expense/(benefit) reclassified from accumulated other comprehensive income for the three months ended September 30, 2019 and 2018, respectively and $1,740 and $174 of income tax expense reclassified from accumulated other comprehensive income for the nine months ended September 30, 2019 and 2018, respectively)	7,941	8,956	29,835	21,530
NET INCOME	34,612	33,710	111,278	84,857
Preferred dividends	0	(13)	0	(39)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 34,612	$ 33,697	$ 111,278	$ 84,818
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 0.94	$ 0.98	$ 3.12	$ 2.61
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	0.94	0.97	3.11	2.59
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.18	$ 0.14	$ 0.50	$ 0.40
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 12,366	$ 12,895	$ 39,789	$ 35,046
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	4,959	4,499	14,258	13,794
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	$ 962	$ 1,111	$ 2,724	$ 2,895