Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Interest income:
Loans	$ 469,146		$ 389,830		$ 319,540
Available-for-sale securities:
Taxable	171,863		165,449		127,422
Non-taxable	3,564		3,623		3,809
Federal funds sold, securities purchased under agreements to resell and other short-term investment securities	4,145		6,486		10,960
Total interest income	648,718		565,388		461,731
Interest expense:
Deposits	6,660		8,862		14,778
Borrowings	24,194		30,249		28,818
Total interest expense	30,854		39,111		43,596
Net interest income	617,864		526,277		418,135
Provision for loan losses	44,330		6,101		44,628
Net interest income after provision for loan losses	573,534		520,176		373,507
Noninterest income:
Gains on investment securities, net	122,114		195,034		93,360
Foreign exchange fees	48,992		43,891		36,150
Deposit service charges	33,421		31,208		31,669
Credit card fees	24,809		18,741		12,685
Gains on derivative instruments, net	22,120		38,681		9,522
Letters of credit and standby letters of credit fees	15,150		12,201		10,482
Client investment fees	14,539		12,421		18,020
Other	54,401		30,155		35,642
Total noninterest income	335,546		382,332		247,530
Noninterest expense:
Compensation and benefits	326,942		313,043		248,606
Professional services	67,845		60,807		56,123
Premises and equipment	40,689		28,335		23,023
Business development and travel	29,409		24,250		20,237
Net occupancy	22,536		19,624		19,378
Correspondent bank fees	11,168		9,052		8,379
FDIC assessments	10,959		10,298		16,498
Provision for unfunded credit commitments	488		4,397		4,083
Other	35,962		30,822		26,491
Total noninterest expense	545,998	[1]	500,628	[1]	422,818	[1]
Income before income tax expense	363,082	[2]	401,880	[2]	198,219	[2]
Income tax expense	113,269		119,087		61,402
Net income before noncontrolling interests	249,813		282,793		136,817
Net income attributable to noncontrolling interests	(74,710)		(110,891)		(41,866)
Net income available to common stockholders	$ 175,103		$ 171,902		$ 94,951
Earnings per common share—basic	$ 3.96		$ 4.00		$ 2.27
Earnings per common share—diluted	$ 3.91		$ 3.94		$ 2.24

[1] The Global Commercial Bank segment includes direct depreciation and amortization of $16.3 million, $12.2 million and $9.7 million for 2012, 2011 and 2010, 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.