Consolidated Statements of Operations - 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	$ 36,522	$ 33,355	$ 107,235	$ 91,486
Interest and dividends on taxable investment securities	5,891	5,577	17,670	17,057
Interest on tax-exempt investment securities	690	613	1,956	1,891
Other interest income	506	86	945	192
Total interest income	43,609	39,631	127,806	110,626
Interest expense:
Interest on deposits	6,159	4,018	16,722	9,332
Interest on short-term borrowings	1,150	1,617	3,556	3,760
Interest on long-term borrowings	546	672	1,811	2,043
Total interest expense	7,855	6,307	22,089	15,135
Net interest income	35,754	33,324	105,717	95,491
Provision for loan losses	1,005	1,302	1,368	4,473
Net interest income after provision for loan losses	34,749	32,022	104,349	91,018
Non-interest income:
Insurance income	3,386	3,388	11,493	11,412
Mortgage banking income	1,204	1,060	2,992	2,380
Bank owned life insurance income	487	495	1,462	1,460
Net gain (loss) on investment securities	97	0	70	(146)
Net (loss) gain on asset disposals and other transactions	(78)	12	(553)	(319)
Other non-interest income	510	391	2,113	2,143
Total non-interest income	16,393	14,353	47,111	42,577
Non-interest expense:
Salaries and employee benefit costs	18,931	17,908	58,957	51,923
Net occupancy and equipment expense	3,098	2,850	9,208	8,519
Electronic banking expense	2,070	1,552	5,340	4,409
Data processing and software expense	1,572	1,408	4,684	4,089
Professional fees	1,544	1,395	5,164	6,135
Amortization of other intangible assets	953	862	2,471	2,477
Franchise tax expense	797	616	2,274	1,874
Marketing expense	634	456	1,718	1,437
Foreclosed real estate and other loan expenses	600	373	1,324	923
Communication expense	268	305	863	949
FDIC insurance expense	0	391	752	1,173
Other non-interest expense	2,526	2,713	10,974	11,113
Total non-interest expense	32,993	30,829	103,729	95,021
Income before income taxes	18,149	15,546	47,731	38,574
Income tax expense	3,281	2,821	8,896	6,216
Net income	$ 14,868	$ 12,725	$ 38,835	$ 32,358
Earnings per common share - basic	$ 0.72	$ 0.65	$ 1.93	$ 1.70
Earnings per common share - diluted	$ 0.72	$ 0.65	$ 1.91	$ 1.69
Weighted-average number of common shares outstanding - basic	20,415,245	19,325,457	20,023,271	18,875,290
Weighted-average number of common shares outstanding - diluted	20,595,769	19,466,865	20,178,634	19,004,087
Cash dividends declared	$ 7,040	$ 5,472	$ 19,943	$ 15,709
Cash dividends declared per common share	$ 0.34	$ 0.28	$ 0.98	$ 0.82
Credit and Debit Card [Member]
Non-interest income:
Revenue from Contract with Customer, Including Assessed Tax	$ 3,577	$ 2,890	$ 9,831	$ 8,460
Deposit Account [Member]
Non-interest income:
Revenue from Contract with Customer, Including Assessed Tax	3,233	2,652	8,551	7,160
Fiduciary and Trust [Member]
Non-interest income:
Revenue from Contract with Customer, Including Assessed Tax	3,205	3,110	9,718	9,410
Interest Rate Swap [Member] | Transaction fee [Member]
Non-interest income:
Revenue from Contract with Customer, Including Assessed Tax	$ 772	$ 355	$ 1,434	$ 617