Interim Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income:
Loans	$ 394,246	$ 352,353	$ 1,202,467	$ 979,724
Investment securities:
Taxable	149,656	142,075	410,768	403,702
Non-taxable	11,123	10,748	32,991	23,506
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	28,867	8,137	74,447	20,080
Total interest income	583,892	513,313	1,720,673	1,427,012
Interest expense:
Deposits	55,106	8,042	130,163	18,409
Borrowings	8,142	12,049	27,577	29,075
Total interest expense	63,248	20,091	157,740	47,484
Net interest income	520,644	493,222	1,562,933	1,379,528
Provision for credit losses	36,536	17,174	89,033	74,226
Net interest income after provision for credit losses	484,108	476,048	1,473,900	1,305,302
Noninterest income:
Gains on investment securities, net	29,849	32,193	106,575	77,365
Gains on equity warrant assets, net	37,561	34,141	107,213	72,393
Client investment fees	46,679	36,265	136,905	88,592
Foreign exchange fees	40,309	32,656	116,863	100,560
Credit card fees	30,158	24,121	86,431	68,739
Deposit service charges	22,482	19,588	65,496	56,081
Lending related fees	11,707	10,675	36,857	30,938
Letters of credit and standby letters of credit fees	10,842	8,409	31,205	24,938
Investment banking revenue	38,516	0	137,005	0
Commissions	12,275	0	40,812	0
Other	13,631	12,022	42,773	38,671
Total noninterest income	294,009	210,070	908,135	558,277
Noninterest expense:
Compensation and benefits	233,840	195,437	715,073	543,198
Professional services	55,202	36,542	133,018	112,080
Premises and equipment	26,775	19,858	72,386	57,576
Net occupancy	16,981	13,694	49,716	40,598
Business development and travel	19,539	12,712	51,915	35,998
FDIC and state assessments	4,881	9,550	13,343	29,306
Other	34,106	21,652	105,059	61,845
Total noninterest expense	391,324	309,445	1,140,510	880,601
Income before income tax expense	386,793	376,673	1,241,525	982,978
Income tax expense	105,075	95,308	331,624	246,561
Net income before noncontrolling interests	281,718	281,365	909,901	736,417
Net income attributable to noncontrolling interests	(14,437)	(6,548)	(35,901)	(28,841)
Net income available to common stockholders	$ 267,281	$ 274,817	$ 874,000	$ 707,576
Earnings per common share—basic (dollars per share)	$ 5.19	$ 5.16	$ 16.80	$ 13.33
Earnings per common share—diluted (dollars per share)	$ 5.15	$ 5.10	$ 16.67	$ 13.15