Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INTEREST INCOME
Interest and Fees on Loans	$ 152,481	$ 112,084	$ 91,745
Interest on Federal Funds Sold and Other Short-term Investments	522	308	134
Interest and Dividends on Securities:
Taxable	13,910	12,398	10,898
Non-taxable	9,561	8,959	8,253
TOTAL INTEREST INCOME	176,474	133,749	111,030
INTEREST EXPENSE
Interest on Deposits	23,805	13,625	7,094
Interest on FHLB Advances and Other Borrowings	7,444	5,514	4,027
TOTAL INTEREST EXPENSE	31,249	19,139	11,121
NET INTEREST INCOME	145,225	114,610	99,909
Provision for Loan Losses	5,325	2,070	1,750
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	139,900	112,540	98,159
NON-INTEREST INCOME
Company Owned Life Insurance	2,005	1,243	1,341
Other Operating Income	3,229	2,785	2,641
Net Gains on Sales of Loans	4,633	3,004	3,280
Net Gains on Securities	1,248	706	596
TOTAL NON-INTEREST INCOME	45,501	37,070	31,854
NON-INTEREST EXPENSE
Salaries and Employee Benefits	63,885	51,306	46,642
Occupancy Expense	9,988	7,735	6,609
Furniture and Equipment Expense	3,788	3,142	2,621
FDIC Premiums	533	1,033	954
Data Processing Fees	7,927	6,942	4,276
Professional Fees	4,674	5,362	2,817
Advertising and Promotion	4,230	3,492	3,543
Intangible Amortization	3,721	1,752	942
Other Operating Expenses	15,416	12,789	9,399
TOTAL NON-INTEREST EXPENSE	114,162	93,553	77,803
Income before Income Taxes	71,239	56,057	52,210
Income Tax Expense	12,017	9,528	11,534
NET INCOME	$ 59,222	$ 46,529	$ 40,676
Basic Earnings per Share (in USD per share)	$ 2.29	$ 1.99	$ 1.77
Diluted Earnings per Share (in USD per share)	2.29	1.99	1.77
Dividends per Share (in USD per share)	$ 0.68	$ 0.60	$ 0.52
Trust and Investment Product Fees
NON-INTEREST INCOME
Non-interest Income	$ 7,278	$ 6,680	$ 5,272
Service Charges on Deposit Accounts
NON-INTEREST INCOME
Non-interest Income	8,718	7,044	6,178
Insurance Revenues
NON-INTEREST INCOME
Non-interest Income	8,940	8,330	7,979
Interchange Fee Income
NON-INTEREST INCOME
Non-interest Income	$ 9,450	$ 7,278	$ 4,567