Consolidated Statements Of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Income
Interest and fees on loans	$ 134,000	$ 143,399	$ 128,546
Taxable interest on investments	18,399	19,509	17,727
Nontaxable interest on investments	3,253	2,701	2,648
Dividend income	655	722	1,315
Other interest income	893	2,187	1,141
Total interest income	157,200	168,518	151,377
Interest Expense
Interest on deposits	15,544	34,001	20,113
Interest on borrowings	1,837	3,621	7,456
Interest on subordinated debentures	3,512	3,266	3,415
Total interest expense	20,893	40,888	30,984
Net interest income	136,307	127,630	120,393
Provision for credit losses	12,418	2,861	847
Net interest income after provision for credit losses	123,889	124,769	119,546
Non-Interest Income
Mortgage banking income, net	18,487	7,837	5,914
Brokerage and insurance commissions	2,832	2,625	2,615
Bank-owned life insurance	2,533	2,425	2,430
Customer loan swap fees	222	1,166	956
Net (loss) gain on sale of securities	0	(105)	275
Other income	3,184	4,170	3,290
Total non-interest income	50,490	42,113	38,176
Non-Interest Expenses
Salaries and employee benefits	57,938	54,489	51,513
Furniture, equipment and data processing	11,756	10,881	10,359
Net occupancy costs	7,585	7,047	6,876
Consulting and professional fees	3,833	3,706	3,752
Debit card expense	3,753	3,613	3,180
Regulatory assessments	1,450	1,261	1,937
Amortization of core deposit intangible assets	682	705	725
Other real estate owned and collection costs, net	382	480	935
Other expenses	12,604	13,121	12,668
Total non-interest expense	99,983	95,303	91,945
Income before income tax expense	74,396	71,579	65,777
Income Tax Expense	14,910	14,376	12,706
Net income	$ 59,486	$ 57,203	$ 53,071
Per Share Data
Basic earnings per share	$ 3.96	$ 3.70	$ 3.40
Diluted earnings per share	$ 3.95	$ 3.69	$ 3.39
Weighted average number of common shares outstanding	14,985,235	15,407,289	15,571,387
Diluted weighted average number of common shares outstanding	15,023,767	15,453,022	15,626,303
Cash dividends declared, per share	$ 1.32	$ 1.23	$ 1.15
Debit Card
Non-Interest Income
Revenue	$ 10,420	$ 9,701	$ 9,067
Deposit Accounts
Non-Interest Income
Revenue	6,697	8,393	8,253
Fiduciary Services
Non-Interest Income
Revenue	$ 6,115	$ 5,901	$ 5,376