Interim Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	[1]	Sep. 30, 2014
Interest income:
Loans		$ 174,993	$ 153,292	$ 507,746		$ 449,144
Investment securities:
Taxable		87,609	73,540	253,496		191,384
Non-taxable		707	772	2,220		2,362
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities		1,482	1,722	4,071		5,301
Total interest income		264,791	229,326	767,533		648,191
Interest expense:
Deposits		1,158	2,961	4,283		8,933
Borrowings		8,973	5,800	25,894		17,400
Total interest expense		10,131	8,761	30,177		26,333
Net interest income		254,660	220,565	737,356		621,858
Provision for loan losses		33,403	16,610	66,368		19,051
Net interest income after provision for loan losses		221,257	203,955	670,988		602,807
Noninterest income:
Gains on investment securities, net		18,768	5,644	77,006		172,236
Gains on derivative instruments, net		10,244	26,538	66,290		63,480
Foreign exchange fees		22,995	17,911	63,037		53,035
Credit card fees		14,536	10,909	40,841		31,440
Deposit service charges		12,272	10,126	34,309		29,344
Lending related fees		7,561	6,029	23,746		18,208
Client investment fees		5,683	3,814	15,429		10,751
Letters of credit and standby letters of credit fees		5,341	4,557	15,315		11,507
Other		11,077	(5,361)	22,315		14,601
Total noninterest income		108,477	80,167	358,288		404,602
Noninterest expense:
Compensation and benefits		109,345	99,932	350,030		302,259
Professional services		21,137	26,081	58,834		68,383
Premises and equipment		12,356	12,631	36,800		36,267
Business development and travel		8,028	10,022	28,904		29,465
Net occupancy		8,548	7,437	24,010		22,436
FDIC and state assessments		6,954	4,587	18,705		13,660
Correspondent bank fees		3,070	3,278	9,775		9,755
Provision for unfunded credit commitments		1,047	2,225	249		5,533
Other	[2]	14,270	13,568	42,101		33,355
Total noninterest expense	[2]	184,755	179,761	569,408		521,113
Income before income tax expense	[2]	144,979	104,361	459,868		486,296
Income tax expense	[2]	57,017	40,207	175,057		137,431
Net income before noncontrolling interests	[2],[3],[4]	87,962	64,154	284,811	[5]	348,865	[5],[6]
Net income attributable to noncontrolling interests	[3]	(6,229)	(177)	(28,419)		(142,985)
Net income available to common stockholders	[2]	$ 81,733	$ 63,977	$ 256,392		$ 205,880
Earnings per common share—basic (dollars per share)	[2]	$ 1.59	$ 1.26	$ 5.00		$ 4.26
Earnings per common share—diluted (dollars per share)		$ 1.57	$ 1.24	$ 4.94		$ 4.18

[1] Amounts for the nine months ended September 30, 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). Amounts prior to January 1, 2015 have not been revised for the adoption of this guidance. See Note 1— "Basis of Presentation” of the “Notes to Interim Consolidated Financial Statements (unaudited)” under Part I, Item 1 of this report for additional details.

[2] Prior period amounts have been revised to reflect the retrospective application of new accounting guidance adopted in the first quarter of 2015 related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 1— "Basis of Presentation" of the "Notes to Interim Consolidated Financial Statements" under Part I, Item 1 in this report.

[3] Amounts for the nine months ended September 30, 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). Amounts prior to January 1, 2015 have not been revised for the adoption of this guidance. See Note 1— "Basis of Presentation” of the “Notes to Interim Consolidated Financial Statements (unaudited)” under Part I, Item 1 of this report for additional details.

[4] Prior period amounts have been revised to reflect the retrospective application of new accounting guidance adopted in the first quarter of 2015 related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 1— "Basis of Presentation" of the "Notes to Interim Consolidated Financial Statements" under Part I, Item 1 in this report.

[5] Cash flows for the nine months ended September 30, 2015 were revised to reflect the adoption of ASU 2015-02 as of January 1, 2015 and cash flows for the nine months ended September 30, 2014 were revised to reflect the retrospective application of our adoption of ASU 2014-01.

[6] Prior period amounts have been revised to reflect the retrospective application of new accounting guidance adopted in the first quarter of 2015 related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 1— "Basis of Presentation" of the "Notes to Interim Consolidated Financial Statements" under Part I, Item 1 in this report.