Interim Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income before noncontrolling interests	$ 284,906	$ 137,033
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,441	24,385
Provision for unfunded credit commitments	3,308	3,361
Changes in fair values of derivatives, net	14,566	(4,296)
Gains on investment securities, net	(166,592)	(67,999)
Depreciation and amortization	19,036	17,281
Amortization of premiums and discounts on investment securities, net	14,419	14,884
Tax expense from stock exercises	0	(1,346)
Amortization of share-based compensation	14,765	12,222
Amortization of deferred loan fees	(39,071)	(32,066)
Deferred income tax expense	5,123	321
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(11,326)	(4,312)
Accounts receivable and payable, net	(3,303)	4,140
Income tax payable and receivable, net	5,176	(11,591)
Accrued compensation	(48,848)	(39,658)
Foreign exchange spot contracts, net	119,577	20,933
Other, net	(12,910)	(40,920)
Net cash provided by operating activities	201,267	32,372
Cash flows from investing activities:
Purchases of available-for-sale securities	(6,045,269)	(220,031)
Proceeds from sales of available-for-sale securities	23,708	8,293
Proceeds from maturities and pay downs of available-for-sale securities	1,050,927	1,337,107
Purchases of held-to-maturity securities	(120,426)	0
Proceeds from maturities and pay downs of held-to-maturity securities	74,236	0
Purchases of non-marketable and other securities (cost and equity method accounting)	(13,532)	(10,858)
Proceeds from sales and distributions of non-marketable and other securities (cost and equity method accounting)	38,265	20,378
Purchases of non-marketable and other securities (fair value accounting)	(126,907)	(65,943)
Proceeds from sales and distributions of non-marketable and other securities (fair value accounting)	146,509	52,103
Net increase in loans	(440,780)	(671,105)
Proceeds from recoveries of charged-off loans	2,933	5,536
Purchases of premises and equipment	(18,744)	(13,546)
Net cash (used for) provided by investing activities	(5,429,080)	441,934
Cash flows from financing activities:
Net increase (decrease) in deposits	5,879,568	(486,378)
Decrease in short-term borrowings	(170)	(160,710)
Capital contributions from noncontrolling interests, net of distributions	6,419	1,903
Tax benefit from stock exercises	6,164	2,861
Proceeds from issuance of common stock, ESPP, and ESOP	12,018	32,286
Net proceeds from public equity offering	434,866	0
Net cash provided by (used for) financing activities	6,338,865	(610,038)
Net increase (decrease) in cash and cash equivalents	1,111,052	(135,732)
Cash and cash equivalents at beginning of period	1,538,779	1,008,983
Cash and cash equivalents at end of period	2,649,831	873,251
Cash paid during the period for:
Interest	17,535	15,655
Income taxes	75,057	64,423
Noncash items during the period:
Changes in unrealized gains and losses on available-for-sale securities, net of tax	76,176	(115,431)
Transfers from available-for-sale securities to held-to-maturity	$ 5,463,920	$ 0