Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Interest income:
Loans	$ 834,155	$ 693,147		$ 610,945
Investment securities:
Taxable	346,937	344,646		271,371
Non-taxable	2,234	2,905		3,136
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	10,070	6,067		6,464
Total interest income	1,193,396	1,046,765		891,916
Interest expense:
Deposits	5,611	5,447		12,114
Borrowings	37,262	34,893		23,207
Total interest expense	42,873	40,340		35,321
Net interest income	1,150,523	1,006,425		856,595
Provision for loan losses	95,697	97,629		59,486
Net interest income after provision for loan losses	1,054,826	908,796		797,109
Noninterest income:
Gain (Loss) on Investments	51,740	89,445	[1],[2]	267,023
Gains on derivative instruments, net	48,581	83,805		96,845
Foreign exchange fees	104,183	87,007		71,659
Credit card fees	68,205	56,657		41,792
Deposit service charges	52,524	46,683		39,937
Lending related fees	33,395	32,536		25,711
Letters of credit and standby letters of credit fees	25,644	20,889		15,649
Client investment fees	32,219	21,610		14,883
Other	40,061	34,162		(1,260)
Total noninterest income	456,552	472,794		572,239
Noninterest expense:
Compensation and benefits	514,270	473,841		409,486
Professional services	94,982	82,839		94,377
Premises and equipment	65,502	51,927		49,716
Business development and travel	40,130	39,524		40,057
Net occupancy	39,928	34,674		30,004
FDIC assessments	30,285	25,455		19,206
Correspondent bank fees	12,457	13,415		13,118
Provision for (Reduction of) unfunded credit commitments	10,982	(1,946)		6,511
Other	62,243	58,287		44,705
Total noninterest expense	870,779	778,016		707,180
Income before income tax expense	640,599	603,574		662,168
Income tax expense	250,333	228,754		183,508
Net income before noncontrolling interests	390,266	374,820	[2],[3]	478,660
Net income attributable to noncontrolling interests	(7,581)	(30,916)	[1],[3]	(214,790)
Net income available to common stockholders	$ 382,685	$ 343,904		$ 263,870
Earnings per common share—basic, in dollars per share	$ 7.37	$ 6.70		$ 5.39
Earnings per common share—diluted, in dollars per share	$ 7.31	$ 6.62		$ 5.31

[1] During the second quarter of 2015 we adopted new accounting guidance 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 2— "Summary of Significant Accounting Policies” of the “Notes to the Consolidated Financial Statements” under Part II, Item 8 of this report for additional details.

[2] During the second quarter of 2015 we adopted new accounting guidance 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 2— "Summary of Significant Accounting Policies” of the “Notes to the Consolidated Financial Statements” under Part II, Item 8 of this report for additional details.

[3] During the second quarter of 2015 we adopted new accounting guidance 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 2— "Summary of Significant Accounting Policies” of the “Notes to the Consolidated Financial Statements” under Part II, Item 8 of this report for additional details.