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Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jul. 26, 2016	Aug. 05, 2014
Short-term Debt [Line Items]
Total short-term borrowings	$ 323,918	$ 326,726
Average daily balance short-term borrowings	324,887	309,471
Maximum month-end balance short-term borrowings	329,401	332,987
Total long-term borrowings	69,670	268,077
Subordinated Notes
Short-term Debt [Line Items]
Total long-term borrowings	69,670	220,000
Average daily balance long-term borrowings	156,340	220,000
Maximum month-end balance long-term borrowings	$ 218,081	$ 220,000
Interest rate, stated percentage	5.84%	5.42%	5.00%	5.75%
Average interest rate	6.39%	5.42%
Month-end interest rate	5.36%	5.42%
Borrowings
Short-term Debt [Line Items]
Total long-term borrowings	$ 0	$ 50,000
Average daily balance long-term borrowings	8,630	50
Maximum month-end balance long-term borrowings	$ 50,000	$ 50,000
Interest rate, stated percentage	0.00%	181.00%
Average interest rate	1.84%	181.00%
Month-end interest rate	1.81%	181.00%
Customer repurchase agreements and federal funds purchased
Short-term Debt [Line Items]
Total short-term borrowings	$ 23,918	$ 26,726
Average daily balance short-term borrowings	24,887	29,345
Maximum month-end balance short-term borrowings	$ 29,401	$ 32,987
Interest rate, stated percentage	0.20%	0.26%
Average interest rate	0.20%	1.00%
Month-end interest rate	0.20%	1.13%
Federal Home Loan Bank – current portion
Short-term Debt [Line Items]
Total short-term borrowings	$ 300,000	$ 300,000
Average daily balance short-term borrowings	300,000	280,126
Maximum month-end balance short-term borrowings	$ 300,000	$ 300,000
Interest rate, stated percentage	0.67%	0.67%
Average interest rate	0.67%	0.66%
Month-end interest rate	0.67%	0.67%

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The calculated average balance outstanding for the year for short-term debt as of the Balance Sheet date.

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