Segments Segments (Segment Balance Sheet Data) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Average Assets	$ 31,940,615	$ 33,605,317
Average Loans, including held for sale	16,782,842	15,569,741
Average Goodwill and other intangible assets	158,067	154,639
Average Deposits	25,308,381	28,100,697
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Average Assets	14,712,363	17,673,594
Average Loans, including held for sale	10,458	16,291
Average Goodwill and other intangible assets	3,600	3,600
Average Deposits	312,876	(62,792)
Consumer Segment [Member] | Operating Segments
Segment Reporting Information [Line Items]
Average Assets	3,984,071	3,853,875
Average Loans, including held for sale	3,832,483	3,705,110
Average Goodwill and other intangible assets	81,655	82,566
Average Deposits	12,243,033	13,417,312
Commercial Segment [Member] | Operating Segments
Segment Reporting Information [Line Items]
Average Assets	11,351,223	10,239,825
Average Loans, including held for sale	11,061,461	10,021,057
Average Goodwill and other intangible assets	72,066	67,727
Average Deposits	10,375,075	11,941,396
Wealth Segment [Member] | Operating Segments
Segment Reporting Information [Line Items]
Average Assets	1,892,958	1,838,023
Average Loans, including held for sale	1,878,440	1,827,283
Average Goodwill and other intangible assets	746	746
Average Deposits	2,377,397	2,804,781
Segment Totals [Member]
Segment Reporting Information [Line Items]
Average Assets	17,228,252	15,931,723
Average Loans, including held for sale	16,772,384	15,553,450
Average Goodwill and other intangible assets	154,467	151,039
Average Deposits	$ 24,995,505	$ 28,163,489