Interim Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income:
Loans	$ 330,298	$ 250,197	$ 627,371	$ 477,538
Investment securities:
Taxable	137,150	95,522	261,627	185,325
Non-taxable	7,666	885	12,758	1,531
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	6,187	7,323	11,943	10,459
Total interest income	481,301	353,927	913,699	674,853
Interest expense:
Deposits	6,270	2,197	10,367	3,914
Borrowings	8,588	9,034	17,026	18,250
Total interest expense	14,858	11,231	27,393	22,164
Net interest income	466,443	342,696	886,306	652,689
Provision for credit losses	29,080	15,806	57,052	46,540
Net interest income after provision for credit losses	437,363	326,890	829,254	606,149
Noninterest income:
Gains on investment securities, net	36,114	17,630	45,172	33,600
Gains on equity warrant assets, net	19,061	10,820	38,252	17,510
Foreign exchange fees	34,077	26,108	67,904	52,355
Credit card fees	22,926	18,099	44,618	35,829
Deposit service charges	18,794	14,563	36,493	28,538
Client investment fees	29,452	12,982	52,327	22,008
Lending related fees	9,528	8,509	20,263	17,470
Letters of credit and standby letters of credit fees	8,347	7,006	16,529	13,645
Other	14,390	12,811	26,649	25,232
Total noninterest income	192,689	128,528	348,207	246,187
Noninterest expense:
Compensation and benefits	181,955	148,973	347,761	296,149
Professional services	46,813	27,925	75,538	53,344
Premises and equipment	19,173	18,958	37,718	34,816
Net occupancy	13,288	11,126	26,904	22,777
Business development and travel	12,095	11,389	23,286	20,584
FDIC and state assessments	10,326	9,313	19,756	17,995
Correspondent bank fees	3,277	3,163	6,687	6,608
Other	18,812	20,399	33,506	36,606
Total noninterest expense	305,739	251,246	571,156	488,879
Income before income tax expense	324,313	204,172	606,305	363,457
Income tax expense	77,287	71,656	151,253	123,061
Net income before noncontrolling interests	247,026	132,516	455,052	240,396
Net income attributable to noncontrolling interests	(9,228)	(9,323)	(22,293)	(15,720)
Net income available to common stockholders	$ 237,798	$ 123,193	$ 432,759	$ 224,676
Earnings per common share—basic (dollars per share)	$ 4.48	$ 2.34	$ 8.17	$ 4.28
Earnings per common share—diluted (dollars per share)	$ 4.42	$ 2.32	$ 8.05	$ 4.22