Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Interest income:
Loans	$ 542,204		$ 469,146		$ 389,830
Available-for-sale securities:
Taxable	180,162		171,863		165,449
Non-taxable	3,201		3,564		3,623
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	4,054		4,145		6,486
Total interest income	729,621		648,718		565,388
Interest expense:
Deposits	9,128		6,660		8,862
Borrowings	23,149		24,194		30,249
Total interest expense	32,277		30,854		39,111
Net interest income	697,344		617,864		526,277
Provision for loan losses	63,693		44,330		6,101
Net interest income after provision for loan losses	633,651		573,534		520,176
Noninterest income:
Gains on investment securities, net	419,408		122,114		195,034
Foreign exchange fees	57,411		52,433		45,774
Gains on derivative instruments, net	42,184		18,679		36,798
Deposit service charges	35,948		33,421		31,208
Credit card fees	32,461		24,809		18,741
Lending related fees	20,980		18,038		8,925
Letters of credit and standby letters of credit fees	14,716		15,150		12,201
Client investment fees	13,959		14,539		12,421
Other	36,139		36,363		21,230
Total noninterest income	673,206		335,546		382,332
Noninterest expense:
Compensation and benefits	366,801		326,942		313,043
Professional services	76,178		67,845		60,807
Premises and equipment	45,935		40,689		28,335
Business development and travel	33,334		29,409		24,250
Net occupancy	24,937		22,536		19,624
FDIC assessments	12,784		10,959		10,298
Correspondent bank fees	12,142		11,168		9,052
Provision for unfunded credit commitments	7,642		488		4,397
Other	41,927		35,962		30,822
Total noninterest expense	621,680	[1]	545,998	[1]	500,628	[1]
Income before income tax expense	685,177	[2]	363,082	[2]	401,880	[2]
Income tax expense	139,058		113,269		119,087
Net income before noncontrolling interests	546,119		249,813		282,793
Net income attributable to noncontrolling interests	(330,266)		(74,710)		(110,891)
Net income available to common stockholders	$ 215,853		$ 175,103		$ 171,902
Earnings per common share—basic	$ 4.76		$ 3.96		$ 4.00
Earnings per common share—diluted	$ 4.70		$ 3.91		$ 3.94

[1] The Global Commercial Bank segment includes direct depreciation and amortization of $21.3 million, $16.3 million and $12.0 million for 2013, 2012 and 2011, respectively.

[2] The internal reporting model used by management to assess segment performance does not calculate income tax expense by segment. Our effective tax rate is a reasonable approximation of the segment rates.