Interim Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income before noncontrolling interests	$ 628,183	$ 455,052
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	52,497	57,052
Gains on investment securities, net	(76,726)	(45,172)
Distributions of earnings from non-marketable and other equity securities	40,584	27,409
Depreciation and amortization	40,824	28,902
Amortization of premiums and discounts on investment securities, net	4,993	(478)
Amortization of share-based compensation	31,768	22,467
Amortization of deferred loan fees	(76,712)	(65,606)
Deferred income tax benefit	(3,854)	(18,594)
Excess tax benefit from exercise of stock options and vesting of restricted shares	(7,369)	(14,488)
Losses from the write-off of premises and equipment	185	7,006
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(3,850)	(28,213)
Accounts receivable and payable, net	22,308	(10,169)
Income tax receivable and payable, net	(87,097)	(21,076)
Accrued compensation	(175,469)	(55,814)
Foreign exchange spot contracts, net	108,307	68,870
Other, net	(37,218)	(26,060)
Net cash provided by operating activities	450,571	347,380
Cash flows from investing activities:
Purchases of available-for-sale securities	(2,553,326)	(390,758)
Proceeds from sales of available-for-sale securities	2,189,087	0
Proceeds from maturities and paydowns of available-for-sale securities	382,054	1,775,568
Purchases of held-to-maturity securities	(277,889)	(4,067,389)
Proceeds from maturities and paydowns of held-to-maturity securities	888,943	935,820
Purchases of non-marketable and other equity securities	(39,287)	(28,099)
Proceeds from sales and distributions of capital of non-marketable and other securities	59,187	75,139
Net increase in loans	(844,830)	(2,855,537)
Purchases of premises and equipment	(18,632)	(14,851)
Acquisition of SVB Leerink, net of cash acquired	(102,328)	0
Net cash used for investing activities	(317,021)	(4,570,107)
Cash flows from financing activities:
Net increase in deposits	6,281,640	4,633,220
Net decrease in short-term borrowings	(607,160)	(616,484)
(Distributions to noncontrolling interests), net of contributions from noncontrolling interests	(23,222)	(14,725)
Common stock repurchases	(346,781)	0
Proceeds from issuance of common stock, ESPP and ESOP	11,359	9,742
Net cash provided by financing activities	5,315,836	4,011,753
Net increase (decrease) in cash and cash equivalents	5,449,386	(210,974)
Cash and cash equivalents at beginning of period	3,571,539	2,923,075
Cash and cash equivalents at end of period	9,020,925	2,712,101
Cash paid during the period for:
Interest	94,851	27,730
Income taxes	310,604	193,682
Noncash items during the period:
Changes in unrealized gains and losses on available-for-sale securities, net of tax	122,597	(52,855)
Distributions of stock from investments	6,747	3,136
Equity warrant assets
Changes in fair values of derivatives, net	(825)	(24,940)
Derivative
Changes in fair values of derivatives, net	$ (9,958)	$ (8,768)