Loans Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Summarized details of Loans
Current	$ 26,365,125	$ 26,365,125	$ 24,077,931
Nonaccrual(a)(b)	108,345	108,345	130,443
Loans and Leases Receivable, Net of Deferred Income, Total	26,494,698	26,494,698	24,224,949
Nonaccrual Loans, Current Portion	$ 65,000	$ 65,000	$ 84,000
Percent of current nonaccrual loans	60.00%	60.00%	65.00%
Financing Receivable, Nonaccrual, Interest Income	$ 0	$ 0	$ 0
Financing Receivable, Nonaccrual, No Allowance	15,000	15,000	9,000
30-59 Days Past Due
Summarized details of Loans
Total Past Due	18,055	18,055	12,754
60-89 Days Past Due
Summarized details of Loans
Total Past Due	1,618	1,618	2,558
90+ Days Past Due
Summarized details of Loans
Total Past Due	1,555	1,555	1,263
PPP
Summarized details of Loans
Current	8,039	8,039	65,941
Nonaccrual(a)(b)	0	0	46
Loans and Leases Receivable, Net of Deferred Income, Total	9,514	9,514	66,070
PPP | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,361	1,361	40
PPP | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	113	113	43
PPP | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Asset-Based Lending
Summarized details of Loans
Current	263,044	263,044	178,027
Nonaccrual(a)(b)	0	0	0
Loans and Leases Receivable, Net of Deferred Income, Total	263,044	263,044	178,027
Asset-Based Lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Asset-Based Lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Asset-Based Lending | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Commercial and industrial
Summarized details of Loans
Current	8,982,984	8,982,984	8,201,272
Nonaccrual(a)(b)	843	843	6,233
Loans and Leases Receivable, Net of Deferred Income, Total	8,984,127	8,984,127	8,208,289
Commercial and industrial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	106	106	579
Commercial and industrial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	61	61	54
Commercial and industrial | 90+ Days Past Due
Summarized details of Loans
Total Past Due	133	133	151
Commercial real estate — owner occupied
Summarized details of Loans
Current	928,152	928,152	971,163
Nonaccrual(a)(b)	0	0	0
Loans and Leases Receivable, Net of Deferred Income, Total	928,152	928,152	971,326
Commercial real estate — owner occupied | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	0	0	163
Commercial real estate — owner occupied | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Commercial real estate — owner occupied | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Commercial and business lending
Summarized details of Loans
Current	10,182,219	10,182,219	9,416,403
Nonaccrual(a)(b)	843	843	6,279
Loans and Leases Receivable, Net of Deferred Income, Total	10,184,836	10,184,836	9,423,711
Commercial and business lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,467	1,467	781
Commercial and business lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	174	174	97
Commercial and business lending | 90+ Days Past Due
Summarized details of Loans
Total Past Due	133	133	151
Commercial real estate — investor
Summarized details of Loans
Current	4,737,934	4,737,934	4,323,276
Nonaccrual(a)(b)	46,823	46,823	60,677
Loans and Leases Receivable, Net of Deferred Income, Total	4,790,241	4,790,241	4,384,569
Commercial real estate — investor | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	5,484	5,484	142
Commercial real estate — investor | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	474
Commercial real estate — investor | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Real estate construction
Summarized details of Loans
Current	1,775,044	1,775,044	1,807,178
Nonaccrual(a)(b)	604	604	177
Loans and Leases Receivable, Net of Deferred Income, Total	1,775,648	1,775,648	1,808,976
Real estate construction | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	0	0	1,618
Real estate construction | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	2
Real estate construction | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Commercial real estate lending
Summarized details of Loans
Current	6,512,978	6,512,978	6,130,454
Nonaccrual(a)(b)	47,427	47,427	60,855
Loans and Leases Receivable, Net of Deferred Income, Total	6,565,889	6,565,889	6,193,545
Commercial real estate lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	5,484	5,484	1,759
Commercial real estate lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	477
Commercial real estate lending | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Total commercial
Summarized details of Loans
Current	16,695,197	16,695,197	15,546,857
Nonaccrual(a)(b)	48,270	48,270	67,134
Loans and Leases Receivable, Net of Deferred Income, Total	16,750,726	16,750,726	15,617,256
Total commercial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	6,952	6,952	2,541
Total commercial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	174	174	573
Total commercial | 90+ Days Past Due
Summarized details of Loans
Total Past Due	133	133	151
Residential mortgage
Summarized details of Loans
Current	7,944,365	7,944,365	7,505,654
Nonaccrual(a)(b)	52,840	52,840	55,362
Loans and Leases Receivable, Net of Deferred Income, Total	8,002,943	8,002,943	7,567,310
Residential mortgage | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	5,213	5,213	5,500
Residential mortgage | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	102	102	669
Residential mortgage | 90+ Days Past Due
Summarized details of Loans
Total Past Due	423	423	126
Auto
Summarized details of Loans
Current	845,010	845,010	142,982
Nonaccrual(a)(b)	53	53	52
Loans and Leases Receivable, Net of Deferred Income, Total	847,969	847,969	143,045
Auto | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	2,635	2,635	11
Auto | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	271	271	0
Auto | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Home equity
Summarized details of Loans
Current	582,782	582,782	584,177
Nonaccrual(a)(b)	7,100	7,100	7,726
Loans and Leases Receivable, Net of Deferred Income, Total	592,843	592,843	595,615
Home equity | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	2,448	2,448	2,867
Home equity | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	514	514	844
Home equity | 90+ Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Other consumer
Summarized details of Loans
Current	297,770	297,770	298,261
Nonaccrual(a)(b)	83	83	170
Loans and Leases Receivable, Net of Deferred Income, Total	300,217	300,217	301,723
Other consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	807	807	1,835
Other consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	557	557	472
Other consumer | 90+ Days Past Due
Summarized details of Loans
Total Past Due	999	999	986
Total consumer
Summarized details of Loans
Current	9,669,928	9,669,928	8,531,074
Nonaccrual(a)(b)	60,075	60,075	63,309
Loans and Leases Receivable, Net of Deferred Income, Total	9,743,972	9,743,972	8,607,693
Total consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	11,104	11,104	10,213
Total consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	1,444	1,444	1,985
Total consumer | 90+ Days Past Due
Summarized details of Loans
Total Past Due	$ 1,422	$ 1,422	$ 1,111