Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 95,369	$ 86,605	$ 287,287	$ 234,276
Interest and dividends on securities:
Taxable	15,887	14,964	49,061	40,702
Tax-exempt	4,759	5,326	15,443	15,216
Total interest and dividends on securities	20,646	20,290	64,504	55,918
Other interest income	1,333	1,498	4,153	3,402
Total interest and dividend income	117,348	108,393	355,944	293,596
INTEREST EXPENSE
Interest bearing demand deposits	4,489	3,501	12,749	9,174
Money market deposits	1,973	1,360	5,881	3,332
Savings deposits	861	352	2,061	768
Certificates of deposit	3,830	3,276	11,831	8,789
Total interest expense on deposits	11,153	8,489	32,522	22,063
Federal Home Loan Bank borrowings	6,645	6,691	19,269	17,142
Other short-term borrowings	1,353	965	4,392	2,497
Subordinated debt and junior subordinated debt	2,077	2,315	6,820	6,425
Total interest expense	21,228	18,460	63,003	48,127
NET INTEREST INCOME	96,120	89,933	292,941	245,469
Provision for credit losses	4,121	1,035	9,375	4,911
Net interest income after provision for credit losses	91,999	88,898	283,566	240,558
NON-INTEREST INCOME
Electronic banking fees	5,253	6,139	18,299	16,697
Net securities brokerage revenue	1,765	1,836	5,597	5,315
Bank-owned life insurance	1,373	1,232	4,032	5,116
Mortgage banking income	2,588	1,521	5,262	4,297
Net securities gains	235	84	3,800	403
Net gain on other real estate owned and other assets	158	150	670	641
Other income	2,097	2,684	8,535	6,444
Total non-interest income	26,950	26,224	85,878	73,715
NON-INTEREST EXPENSE
Salaries and wages	32,915	30,335	95,501	82,213
Employee benefits	9,726	7,905	29,419	22,782
Net occupancy	5,392	4,957	16,343	13,715
Equipment	5,273	4,488	14,924	12,532
Marketing	1,505	1,446	4,002	3,967
FDIC insurance	(1,221)	789	1,287	2,315
Amortization of intangible assets	2,446	1,821	7,424	4,218
Restructuring and merger-related expense	1,688	10,811	4,876	16,468
Other operating expenses	15,544	13,568	45,876	36,024
Total non-interest expense	73,268	76,120	219,652	194,234
Income before provision for income taxes	45,681	39,002	149,792	120,039
Provision for income taxes	8,334	6,516	27,295	20,855
NET INCOME	$ 37,347	$ 32,486	$ 122,497	$ 99,184
EARNINGS PER COMMON SHARE
Basic	$ 0.68	$ 0.65	$ 2.24	$ 2.11
Diluted	$ 0.68	$ 0.64	$ 2.24	$ 2.11
AVERAGE COMMON SHARES OUTSTANDING
Basic	54,695,578	50,277,847	54,641,057	46,965,095
Diluted	54,751,344	50,432,112	54,705,761	47,107,829
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.31	$ 0.29	$ 0.93	$ 0.87
COMPREHENSIVE INCOME	$ 43,156	$ 25,965	$ 170,290	$ 71,869
Total Trust Fees [Member]
NON-INTEREST INCOME
NON-INTEREST INCOME	6,425	6,265	19,880	18,520
Service Charges on Deposits [Member]
NON-INTEREST INCOME
NON-INTEREST INCOME	$ 7,056	$ 6,313	$ 19,803	$ 16,282