Interim Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income before noncontrolling interests	$ 137,033	$ 97,011
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	24,385	22,528
Provision for unfunded credit commitments	3,361	1,664
Changes in fair values of derivatives, net	(4,296)	(11,024)
Gains on investment securities, net	(67,999)	(33,648)
Depreciation and amortization	17,281	13,594
Amortization of premiums and discounts on available-for-sale securities, net	14,884	25,273
Tax (expense) benefit from stock exercises	(1,346)	1,143
Amortization of share-based compensation	12,222	10,977
Amortization of deferred loan fees	(32,066)	(32,881)
Deferred income tax expense	321	5,876
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	614	0
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(4,312)	(4,444)
Accounts receivable and payable, net	4,140	22,886
Income tax payable and receivable, net	(11,591)	(15,715)
Accrued compensation	(39,658)	(60,192)
Foreign exchange spot contracts, net	20,933	(43,405)
Other, net	(40,920)	(1,502)
Net cash provided by (used for) operating activities	32,986	(6,102)
Cash flows from investing activities:
Purchases of available-for-sale securities	(220,031)	(1,778,451)
Proceeds from sales of available-for-sale securities	8,293	325,608
Proceeds from maturities and pay downs of available-for-sale securities	1,337,107	1,380,865
Purchases of nonmarketable securities (cost and equity method accounting)	(10,858)	(101,506)
Proceeds from sales of nonmarketable securities (cost and equity method accounting)	20,378	23,267
Purchases of nonmarketable securities (fair value accounting)	(65,943)	(63,017)
Proceeds from sales and distributions of nonmarketable securities (fair value accounting)	52,103	59,711
Net increase in loans	(671,105)	(817,601)
Proceeds from recoveries of charged-off loans	5,536	6,811
Purchases of premises and equipment	(14,160)	(20,016)
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	441,320	(981,459)
Cash flows from financing activities:
Net (decrease) increase in deposits	(486,378)	1,359,276
(Decrease) increase in short-term borrowings	(160,710)	5,880
Principal payments of other long term debt	0	(1,222)
Capital contributions from noncontrolling interests, net of distributions	1,903	33,350
Tax benefit from stock exercises	2,861	4,180
Proceeds from issuance of common stock and ESPP	32,286	24,303
Principal payments of 5.70% Senior Notes	0	(141,429)
Net cash (used for) provided by financing activities	(610,038)	1,284,338
Net (decrease) increase in cash and cash equivalents	(135,732)	296,777
Cash and cash equivalents at beginning of period	1,008,983	1,114,948
Cash and cash equivalents at end of period	873,251	1,411,725
Cash paid during the period for:
Interest	15,655	15,913
Income taxes	64,423	58,992
Noncash items during the period:
Unrealized (losses) gains on available-for-sale securities, net of tax	$ (115,431)	$ 19,987