Interim Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income before noncontrolling interests	$ 291,612	$ 208,026
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	28,551	27,972
Gains on investment securities, net	(29,028)	(9,058)
Distributions of earnings from non-marketable and other equity securities	15,619	11,385
Depreciation and amortization	20,830	14,377
Amortization of premiums and discounts on investment securities, net	1,606	(1,125)
Amortization of share-based compensation	15,122	10,523
Amortization of deferred loan fees	(35,276)	(29,133)
Deferred income tax benefit	(8,834)	(8,834)
Excess tax benefit from exercise of stock options and vesting of restricted shares	(2,804)	(2,543)
Losses from the write-off of premises and equipment	52	0
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(3,361)	(18,365)
Accounts receivable and payable, net	30,447	(7,277)
Income tax receivable and payable, net	94,552	69,869
Accrued compensation	(253,769)	(106,356)
Foreign exchange spot contracts, net	169,079	134,638
Other, net	19,668	67,885
Net cash provided by operating activities	340,750	348,404
Cash flows from investing activities:
Purchases of available-for-sale securities	(204,328)	0
Proceeds from sales of available-for-sale securities	1,171,564	0
Proceeds from maturities and paydowns of available-for-sale securities	116,001	911,839
Purchases of held-to-maturity securities	0	(2,295,985)
Proceeds from maturities and paydowns of held-to-maturity securities	428,433	470,232
Purchases of non-marketable and other equity securities	(16,165)	(20,401)
Proceeds from sales and distributions of capital of non-marketable and other securities	19,979	9,377
Net increase in loans	(505,516)	(1,463,998)
Purchases of premises and equipment	(5,504)	(7,717)
Acquisition of SVB Leerink, net of cash acquired	(100,037)	0
Net cash provided by (used for) investing activities	904,427	(2,396,653)
Cash flows from financing activities:
Net increase in deposits	2,998,297	1,682,457
Net (decrease) increase in short-term borrowings	(616,957)	68,410
(Distributions to noncontrolling interests), net of contributions from noncontrolling interests	(15,720)	(8,407)
Common stock repurchases	(116,023)	0
Proceeds from issuance of common stock, ESPP and ESOP	570	2,098
Net cash provided by financing activities	2,250,167	1,744,558
Net increase (decrease) in cash and cash equivalents	3,495,344	(303,691)
Cash and cash equivalents at beginning of period	3,571,539	2,923,075
Cash and cash equivalents at end of period	7,066,883	2,619,384
Cash paid during the period for:
Interest	46,548	20,411
Income taxes	17,570	9,385
Noncash items during the period:
Changes in unrealized gains and losses on available-for-sale securities, net of tax	36,411	(42,101)
Distributions of stock from investments	1,276	2,282
Equity warrant assets
Changes in fair values of derivatives, net	(10,248)	(17,508)
Derivative
Changes in fair values of derivatives, net	$ (3,068)	$ 3,928