Interim Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans	$ 368,981	$ 394,246	$ 1,116,660	$ 1,202,467
Investment securities:
Taxable	156,517	149,656	452,449	410,768
Non-taxable	14,912	11,123	42,200	32,991
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	2,717	28,867	22,743	74,447
Total interest income	543,127	583,892	1,634,052	1,720,673
Interest expense:
Deposits	8,218	55,106	51,310	130,163
Borrowings	7,169	8,142	17,938	27,577
Total interest expense	15,387	63,248	69,248	157,740
Net interest income	527,740	520,644	1,564,804	1,562,933
(Reduction) provision for credit losses	(52,018)	36,536	257,943	89,033
Net interest income after provision for credit losses	579,758	484,108	1,306,861	1,473,900
Noninterest income:
Gains on investment securities, net	189,837	29,849	270,760	106,575
Gains on equity warrant assets, net	53,766	37,561	93,667	107,213
Client investment fees	31,914	46,679	107,192	136,905
Foreign exchange fees	43,881	40,309	127,642	116,863
Credit card fees	22,756	30,158	72,348	86,431
Deposit service charges	22,015	22,482	67,115	65,496
Lending related fees	13,562	11,707	37,851	36,857
Letters of credit and standby letters of credit fees	12,192	10,842	35,155	31,205
Investment banking revenue	92,181	38,516	280,551	137,005
Commissions	16,257	12,275	49,197	40,812
Other	49,222	13,631	76,887	42,773
Total noninterest income	547,583	294,009	1,218,365	908,135
Noninterest expense:
Compensation and benefits	327,369	233,840	902,752	715,073
Professional services	67,215	55,202	169,748	133,018
Premises and equipment	30,772	26,775	85,420	72,386
Net occupancy	18,965	16,981	56,156	49,716
Business development and travel	2,214	19,539	19,277	51,915
FDIC and state assessments	6,933	4,881	18,986	13,343
Other	37,553	34,106	117,903	105,059
Total noninterest expense	491,021	391,324	1,370,242	1,140,510
Income before income tax expense	636,320	386,793	1,154,984	1,241,525
Income tax expense	162,265	105,075	299,491	331,624
Net income before noncontrolling interests	474,055	281,718	855,493	909,901
Net income attributable to noncontrolling interests	(27,748)	(14,437)	(40,035)	(35,901)
Preferred stock dividends	(4,594)	0	(12,557)	0
Net income available to common stockholders	$ 441,713	$ 267,281	$ 802,901	$ 874,000
Earnings per common share—basic (dollars per share)	$ 8.53	$ 5.19	$ 15.55	$ 16.80
Earnings per common share—diluted (dollars per share)	$ 8.47	$ 5.15	$ 15.46	$ 16.67