Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jul. 26, 2016	Aug. 05, 2014
Short-term Debt [Line Items]
Total short-term borrowings	$ 1,010,101	$ 323,918
Average daily balance short-term borrowings	203,462	324,887
Maximum month-end balance short-term borrowings	1,032,954	329,401
Total long-term borrowings	69,794	69,670
Subordinated Notes
Short-term Debt [Line Items]
Total long-term borrowings	69,794	69,670
Average daily balance long-term borrowings	69,737	156,340
Maximum month-end balance long-term borrowings	$ 69,794	$ 218,081
Interest rate, stated percentage	5.75%	5.84%	5.00%	5.75%
Average interest rate	5.75%	6.39%
Month-end interest rate	5.75%	5.36%
Borrowings
Short-term Debt [Line Items]
Average daily balance long-term borrowings	$ 0	$ 8,630
Maximum month-end balance long-term borrowings	$ 0	$ 50,000
Average interest rate	0.00%	1.84%
Month-end interest rate	0.00%	1.84%
Customer repurchase agreements and federal funds purchased
Short-term Debt [Line Items]
Total short-term borrowings	$ 35,100	$ 23,918
Average daily balance short-term borrowings	30,745	24,887
Maximum month-end balance short-term borrowings	$ 57,953	$ 29,401
Interest rate, stated percentage	2.55%	0.20%
Average interest rate	1.16%	0.20%
Month-end interest rate	2.63%	0.20%
Federal Home Loan Bank – current portion
Short-term Debt [Line Items]
Total short-term borrowings	$ 975,001	$ 300,000
Average daily balance short-term borrowings	172,717	300,000
Maximum month-end balance short-term borrowings	$ 975,001	$ 300,000
Interest rate, stated percentage	4.29%	0.67%
Average interest rate	2.30%	0.67%
Month-end interest rate	4.57%	0.67%