Parent Only Financial Information Parent Only Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Interest and Dividends on Investments	$ 115,550	$ 111,896	$ 109,759
Other Operating Income	1,774	3,464	1,477
Interest expense	5,195	12,694	21,710
Other Operating Expense	11,524	8,964	10,430
Provision for Income Taxes	14,547	11,036	9,600
Net Income	49,857	40,827	37,475
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Condensed Financial Statements, Captions [Line Items]
Dividends from Bank Subsidiaries	15,994	17,199	14,100
Interest and Dividends on Investments	49	49	49
Other Operating Income	664	246	1,006
Total Income	16,707	17,494	15,155
Interest expense	686	746	1,024
Other Operating Expense	879	878	875
Total Expense	1,565	1,624	1,899
Income Before Income Tax Benefit and Equity in Undistributed Net Income of Subsidiaries	15,142	15,870	13,256
Provision for Income Taxes	312	431	466
Equity in Undistributed Net Income of Subsidiaries	34,403	24,526	23,753
Net Income	$ 49,857	$ 40,827	$ 37,475