Borrowings, Short-Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Borrowings [Abstract]
FHLB, unused lines of credit available for short-term financing	$ 2,900,000	$ 3,450,000
Short-term borrowings [Abstract]
Balance at year-end	585,012	97,795
Federal Funds Purchased [Member]
Short-term borrowings [Abstract]
Balance at year-end	60,000	0	$ 0
Average during the year	14,644	17	14,727
Maximum month end balance	$ 80,000	$ 0	$ 40,000
Weighted average rate during the year	4.02%	0.11%	2.05%
Weighted average rate at year-end	4.28%	0.00%	0.00%
Securities Sold Under Repurchase Agreements [Member]
Short-term borrowings [Abstract]
Balance at year-end	$ 86,012	$ 97,795	$ 143,386
Average during the year	69,561	100,519	154,383
Maximum month end balance	$ 88,637	$ 135,623	$ 176,840
Weighted average rate during the year	0.10%	0.13%	0.17%
Weighted average rate at year-end	0.11%	0.11%	0.20%
Other Short-Term Borrowings [Member]
Short-term borrowings [Abstract]
Balance at year-end	$ 439,000	$ 0	$ 25,000
Average during the year	46,371	1,302	183,699
Maximum month end balance	$ 439,000	$ 0	$ 366,500
Weighted average rate during the year	4.24%	2.02%	1.55%
Weighted average rate at year-end	4.45%	0.00%	1.99%