Interim Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income:
Loans	$ 365,110	$ 414,077	$ 747,679	$ 808,221
Investment securities:
Taxable	141,547	134,395	295,932	261,112
Non-taxable	14,464	10,931	27,288	21,868
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	2,402	26,364	20,026	45,580
Total interest income	523,523	585,767	1,090,925	1,136,781
Interest expense:
Deposits	5,694	47,150	43,092	75,057
Borrowings	4,902	9,214	10,769	19,435
Total interest expense	10,596	56,364	53,861	94,492
Net interest income	512,927	529,403	1,037,064	1,042,289
Provision for credit losses	66,481	23,946	309,961	52,497
Net interest income after provision for credit losses	446,446	505,457	727,103	989,792
Noninterest income:
Gains on investment securities, net	34,868	47,698	80,923	76,726
Gains on equity warrant assets, net	26,506	48,347	39,901	69,652
Client investment fees	31,885	45,744	75,278	90,226
Foreign exchange fees	36,256	38,506	83,761	76,554
Credit card fees	21,288	28,790	49,592	56,273
Deposit service charges	20,511	22,075	45,100	43,014
Lending related fees	11,164	11,213	24,289	25,150
Letters of credit and standby letters of credit fees	11,421	11,009	22,963	20,363
Investment banking revenue	141,503	48,694	188,370	98,489
Commissions	16,918	14,429	32,940	28,537
Other	16,528	17,245	27,665	29,142
Total noninterest income	368,848	333,750	670,782	614,126
Noninterest expense:
Compensation and benefits	319,797	243,172	575,383	481,233
Professional services	63,828	40,830	102,533	77,816
Premises and equipment	27,708	23,911	54,648	45,611
Net occupancy	18,845	16,687	37,191	32,735
Business development and travel	2,992	17,022	17,063	32,376
FDIC and state assessments	6,819	4,483	12,053	8,462
Other	39,647	37,417	80,350	70,953
Total noninterest expense	479,636	383,522	879,221	749,186
Income before income tax expense	335,658	455,685	518,664	854,732
Income tax expense	87,869	119,114	137,226	226,549
Net income before noncontrolling interests	247,789	336,571	381,438	628,183
Net income attributable to noncontrolling interests	(14,260)	(18,584)	(12,287)	(21,464)
Preferred stock dividends	(4,594)	0	(7,963)	0
Net income available to common stockholders	$ 228,935	$ 317,987	$ 361,188	$ 606,719
Earnings per common share—basic (dollars per share)	$ 4.44	$ 6.12	$ 7.00	$ 11.61
Earnings per common share—diluted (dollars per share)	$ 4.42	$ 6.08	$ 6.97	$ 11.51