Interim Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income:
Loans (1)	$ 197,942	$ 165,501	[1]
Investment securities:
Taxable	91,050	81,274
Non-taxable	596	772
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities (1)	2,070	1,269	[1]
Total interest income	291,658	248,816
Interest expense:
Deposits	1,188	1,943
Borrowings (1)	9,049	7,948	[1]
Total interest expense	10,237	9,891
Net interest income	281,421	238,925
Provision for loan losses	33,341	6,452
Net interest income after provision for loan losses	248,080	232,473
Noninterest income:
(Losses) gains on investment securities, net (1)	(4,684)	33,263	[1]
(Losses) gains on derivative instruments, net	(1,695)	39,729
Foreign exchange fees	26,966	17,678
Credit card fees	15,507	12,090
Deposit service charges	12,672	10,736
Client investment fees	7,995	4,482
Lending related fees	7,813	8,022
Letters of credit and standby letters of credit fees	5,589	5,202
Other (1)	15,971	(7,678)	[1]
Total noninterest income	86,134	123,524
Noninterest expense:
Compensation and benefits	122,262	115,770
Professional services (1)	19,000	18,747	[1]
Premises and equipment	14,984	12,657
Business development and travel	12,246	11,112
Net occupancy	10,035	7,313
FDIC and state assessments	6,927	5,789
Correspondent bank fees (1)	3,652	3,368	[1]
Provision for unfunded credit commitments	134	2,263
Other	14,793	13,522	[1]
Total noninterest expense	204,033	190,541
Income before income tax expense	130,181	165,456
Income tax expense	53,584	63,066
Net income before noncontrolling interests	76,597	102,390	[2],[3],[4]
Net loss (income) attributable to noncontrolling interests (1)	2,577	(13,874)	[1],[2]
Net income available to common stockholders	$ 79,174	$ 88,516
Earnings per common share—basic (dollars per share)	$ 1.53	$ 1.74
Earnings per common share—diluted (dollars per share)	$ 1.52	$ 1.71

[1] Amounts for the three months ended March 31, 2015, have been revised to reflect the retrospective application of new accounting guidance adopted in the second quarter of 2015 related to our consolidated variable interest entities (ASU 2015-02).

[2] Amounts for the three months ended March 31, 2015, have been revised to reflect the retrospective application of new accounting guidance adopted in the second quarter of 2015 related to our consolidated variable interest entities (ASU 2015-02).

[3] Amounts for the three months ended March 31, 2015, have been revised to reflect the retrospective application of new accounting guidance adopted in the second quarter of 2015 related to our consolidated variable interest entities (ASU 2015-02).

[4] Amounts for the three months ended March 31, 2015, have been revised to reflect the retrospective application of new accounting guidance adopted in the second quarter of 2015 related to our consolidated variable interest entities (ASU 2015-02).