Interim Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income before noncontrolling interests	$ 353,213	$ 150,151
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	35,023	29,316
Provision for (reduction of) unfunded credit commitments	6,135	1,264
Changes in fair values of derivatives, net	(16,594)	(4,411)
Gains on investment securities, net	(255,861)	(53,876)
Depreciation and amortization	26,474	22,651
Amortization of premiums and discounts on available-for-sale securities, net	21,040	42,511
Tax (expense) benefit from stock exercises	(1,353)	1,245
Amortization of share-based compensation	18,945	16,594
Amortization of deferred loan fees	(51,941)	(42,308)
Deferred income tax expense	(3,488)	(997)
Gain on the sale of certain assets related to our equity services management business	0	(4,243)
Losses from the write-off of premises and equipment	1,273	1,941
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(5,183)	(9,084)
Accounts receivable and payable, net	1,463	33,277
Income tax payable and receivable, net	(7,787)	6,223
Accrued compensation	(7,481)	(40,600)
Foreign exchange spot contracts, net	12,442	(41,188)
Other, net	(27,005)	19,140
Net cash provided by operating activities	99,315	127,606
Cash flows from investing activities:
Purchases of available-for-sale securities	(906,495)	(2,859,155)
Proceeds from sales of available-for-sale securities	10,207	326,178
Proceeds from maturities and pay downs of available-for-sale securities	1,879,424	2,047,753
Purchases of non-marketable and other securities (cost and equity method accounting)	(20,019)	(114,134)
Proceeds from sales of non-marketable and other securities (cost and equity method accounting)	47,069	31,903
Purchases of non-marketable and other securities (fair value accounting)	(108,663)	(99,062)
Proceeds from sales and distributions of non-marketable and other securities (fair value accounting)	103,105	94,188
Net increase in loans	(867,075)	(1,218,366)
Proceeds from recoveries of charged-off loans	8,163	8,018
Purchases of premises and equipment	(22,110)	(33,489)
Proceeds from the sale of certain assets related to our equity services management business	0	2,870
Net cash provided by (used for) investing activities	123,606	(1,813,296)
Cash flows from financing activities:
Net increase in deposits	820,539	1,015,530
(Decrease) increase in short-term borrowings	(160,530)	508,170
Principal payments of other long term debt	0	(1,222)
Capital contributions from noncontrolling interests, net of distributions	7,922	63,956
Tax benefit from stock exercises	4,501	5,067
Proceeds from issuance of common stock and ESPP	38,408	27,350
Principal payments of 5.70% Senior Notes	0
Net cash provided by financing activities	710,840	1,477,422
Net increase (decrease) in cash and cash equivalents	933,761	(208,268)
Cash and cash equivalents at beginning of period	1,008,983	1,114,948
Cash and cash equivalents at end of period	1,942,744	906,680
Cash paid during the period for:
Interest	28,339	28,000
Income taxes	107,282	69,094
Noncash items during the period:
Unrealized (losses) gains on available-for-sale securities, net of tax	$ (99,308)	$ 36,170