CONSOLIDATED STATEMENTS OF 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:
Interest and fees on loans	$ 106,027	$ 96,787	$ 206,483	$ 182,438
Interest on securities:
Taxable	16,123	12,270	31,999	23,847
Nontaxable	2,554	3,584	5,647	7,163
Interest on federal funds sold	0	0	4	0
Interest on interest bearing deposits in other financial institutions	2,299	768	3,591	1,175
TOTAL INTEREST INCOME	127,003	113,409	247,724	214,623
INTEREST EXPENSE:
Interest on deposits	16,138	7,983	29,351	13,749
Interest on short-term borrowings	338	547	1,227	815
Interest on other borrowings (includes $100 and $30 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three months ended June 30, 2019 and 2018, respectively, and $265 and $227 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the six months ended June 30, 2019 and 2018, respectively)	3,819	3,470	7,483	7,066
TOTAL INTEREST EXPENSE	20,295	12,000	38,061	21,630
NET INTEREST INCOME	106,708	101,409	209,663	192,993
Provision for loan losses	4,918	4,831	6,553	9,094
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	101,790	96,578	203,110	183,899
NONINTEREST INCOME:
Revenue from contract with customers	20,482	17,564	38,484	33,230
Loan servicing income	1,338	1,807	3,067	3,561
Securities gains/(losses), net (includes $3,580 of net security gains and $259 of net security losses reclassified from accumulated other comprehensive income for the three months ended June 30, 2019 and 2018, respectively and $5,155 and $1,182 of net security gains reclassified from accumulated other comprehensive income for the six months ended June 30, 2019 and 2018, respectively)	3,580	(259)	5,155	1,182
Unrealized gain on equity securities, net	112	71	370	43
Net gains on sale of loans held for sale	4,343	6,800	7,519	10,851
Valuation allowance on servicing rights	(364)	(216)	(953)	(218)
Income on bank owned life insurance	888	700	1,787	1,314
Other noninterest income	1,682	1,167	3,349	2,387
TOTAL NONINTEREST INCOME	32,061	27,634	58,778	52,350
NONINTEREST EXPENSES:
Salaries and employee benefits	49,995	50,758	100,280	99,468
Occupancy	6,436	6,315	13,043	12,358
Furniture and equipment	3,220	3,184	5,912	5,933
Professional fees	14,968	10,632	26,347	20,080
Advertising	2,661	2,145	4,986	4,085
Core deposit intangibles and customer relationship intangibles amortization	3,313	2,274	6,155	4,137
Other real estate and loan collection expenses	162	948	863	1,680
(Gain)/loss on sales/valuations of assets, net	(18,286)	1,528	(21,290)	1,331
Restructuring expenses	0	0	3,227	2,564
Other noninterest expenses	12,629	11,098	23,805	20,892
TOTAL NONINTEREST EXPENSES	75,098	88,882	163,328	172,528
INCOME BEFORE INCOME TAXES	58,753	35,330	98,560	63,721
Income taxes (includes $880 and $(61) of income tax expense/(benefit) reclassified from accumulated other comprehensive income for the three months ended June 30, 2019 and 2018, respectively and $1,238 and $201 of income tax expense reclassified from accumulated other comprehensive income for the six months ended June 30, 2019 and 2018, respectively)	13,584	7,451	21,894	12,574
NET INCOME	45,169	27,879	76,666	51,147
Preferred dividends	0	(13)	0	(26)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 45,169	$ 27,866	$ 76,666	$ 51,121
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 1.26	$ 0.85	$ 2.18	$ 1.62
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	1.26	0.85	2.17	1.61
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.16	$ 0.13	$ 0.32	$ 0.26
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 14,629	$ 12,072	$ 27,423	$ 22,151
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	4,825	4,615	9,299	9,295
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	$ 1,028	$ 877	$ 1,762	$ 1,784