Parent Only Financial Information Parent Only Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net Income	$ 48,799	$ 49,857	$ 40,827
Shares Issued Under the Directors’ Stock Plan	408	376	125
Net Cash Provided By Operating Activities	59,713	68,206	42,314
Cash Flows from Financing Activities:
Shares Issued for Stock Option Exercises, net	631	1,505	748
Shares Issued Under the Employee Stock Purchase Plan	477	481	513
Shares Issued for Dividend Reinvestment Plans	1,904	1,836	1,808
Purchase of Treasury Stock	(2,872)	(2,662)	(1,578)
Cash Dividends Paid	(17,444)	(16,296)	(15,740)
Net Cash (Used) Provided By Financing Activities	(59,687)	283,101	455,773
Net (Decrease) Increase in Cash and Cash Equivalents	(393,036)	76,705	310,770
Cash and Cash Equivalents at Beginning of Year	457,696	380,991	70,221
Cash and Cash Equivalents at End of Year	64,660	457,696	380,991
Interest on Deposits and Borrowings	5,752	5,373	13,799
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Cash Flows from Operating Activities:
Net Income	48,799	49,857	40,827
Undistributed Net Income of Subsidiaries	(29,849)	(34,403)	(24,526)
Shares Issued Under the Directors’ Stock Plan	408	376	125
Changes in Other Assets and Other Liabilities	(754)	(462)	(3,606)
Net Cash Provided By Operating Activities	18,604	15,368	12,820
Cash Flows from Financing Activities:
Shares Issued for Stock Option Exercises, net	631	1,505	748
Shares Issued Under the Employee Stock Purchase Plan	477	481	513
Shares Issued for Dividend Reinvestment Plans	1,904	1,836	1,808
Purchase of Treasury Stock	(2,872)	(2,662)	(1,578)
Cash Dividends Paid	(17,444)	(16,296)	(15,740)
Net Cash (Used) Provided By Financing Activities	(17,304)	(15,136)	(14,249)
Net (Decrease) Increase in Cash and Cash Equivalents	1,300	232	(1,429)
Cash and Cash Equivalents at Beginning of Year	232	0	1,429
Cash and Cash Equivalents at End of Year	1,532	232	0
Interest on Deposits and Borrowings	$ 685	$ 686	$ 746