CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME:
Interest and fees on loans	$ 105,733	$ 82,906	$ 288,171	$ 217,898
Interest on securities:
Taxable	14,433	10,394	38,280	27,246
Nontaxable	3,490	5,086	10,653	15,297
Interest on federal funds sold	0	34	0	37
Interest on interest bearing deposits in other financial institutions	1,238	558	2,413	1,112
TOTAL INTEREST INCOME	124,894	98,978	339,517	261,590
INTEREST EXPENSE:
Interest on deposits	10,092	5,073	23,841	12,966
Interest on short-term borrowings	464	271	1,279	498
Interest on other borrowings (includes $242 and $308 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the three months ended September 30, 2018 and 2017, respectively, and $469 and $1,005 of interest expense related to derivatives reclassified from accumulated other comprehensive income for the nine months ended September 30, 2018 and 2017, respectively)	3,660	3,790	10,726	10,674
TOTAL INTEREST EXPENSE	14,216	9,134	35,846	24,138
NET INTEREST INCOME	110,678	89,844	303,671	237,452
Provision for loan losses	5,238	5,705	14,332	10,235
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	105,440	84,139	289,339	227,217
NONINTEREST INCOME:
Revenue from contract with customers	18,505	14,960	51,735	43,735
Loan servicing income	1,670	1,161	5,231	4,236
Securities gains/(losses), net (includes $145 of net security losses and $1,679 of net security gains reclassified from accumulated other comprehensive income for the three months ended September 30, 2018 and 2017, respectively, and $1,037 and $5,553 of net security gains reclassified from accumulated other comprehensive income for the nine months ended September 30, 2018 and 2017, respectively)	(145)	1,679	1,037	5,553
Unrealized gain on equity securities, net	54	0	97	0
Net gains on sale of loans held for sale	7,410	4,997	18,261	17,961
Valuation allowance on commercial servicing rights	230	5	12	29
Income on bank owned life insurance	892	766	2,206	2,039
Other noninterest income	1,149	1,409	3,536	2,941
TOTAL NONINTEREST INCOME	29,765	24,977	82,115	76,494
NONINTEREST EXPENSES:
Salaries and employee benefits	49,921	45,225	149,389	128,118
Occupancy	6,348	6,223	18,706	16,352
Furniture and equipment	3,470	2,826	9,403	7,913
Professional fees	11,681	8,450	30,088	24,342
FDIC insurance assessments	1,119	894	2,792	2,610
Advertising	2,754	1,358	6,839	5,141
Core deposit intangibles and customer relationship intangibles amortization	2,626	1,863	6,763	4,252
Other real estate and loan collection expenses	784	581	2,464	1,774
Loss on sales/valuations of assets, net	912	1,342	2,243	1,642
Restructuring expenses	0	0	2,564	0
Other noninterest expenses	12,924	9,997	33,816	27,653
TOTAL NONINTEREST EXPENSES	92,539	78,759	265,067	219,797
INCOME BEFORE INCOME TAXES	42,666	30,357	106,387	83,914
Income taxes (includes $(26) and $511 of income tax expense/(benefit) reclassified from accumulated other comprehensive income for the three months ended September 30, 2018 and 2017, respectively, and $174 and $1,696 of income tax expense/(benefit) reclassified from accumulated other comprehensive income for the nine months ended September 30, 2018 and 2017, respectively)	8,956	8,725	21,530	22,314
NET INCOME	33,710	21,632	84,857	61,600
Preferred dividends	(13)	(13)	(39)	(45)
Interest expense on convertible preferred debt	0	3	0	12
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 33,697	$ 21,622	$ 84,818	$ 61,567
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 0.98	$ 0.73	$ 2.61	$ 2.23
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	0.97	0.72	2.59	2.21
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.14	$ 0.11	$ 0.40	$ 0.33
Service charges and fees
NONINTEREST INCOME:
Revenue from contract with customers	$ 12,895	$ 10,138	$ 35,046	$ 29,291
Trust fees
NONINTEREST INCOME:
Revenue from contract with customers	4,499	3,872	13,794	11,482
Brokerage and insurance commissions
NONINTEREST INCOME:
Revenue from contract with customers	$ 1,111	$ 950	$ 2,895	$ 2,962