Interim Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income before noncontrolling interests	$ 855,493,000	$ 909,901,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	257,943,000	89,033,000
Gains on investment securities, net	(270,760,000)	(106,575,000)
Distributions of earnings from non-marketable and other equity securities	64,703,000	77,584,000
Depreciation and amortization	73,607,000	60,408,000
Amortization of premiums and discounts on investment securities, net	54,918,000	9,646,000
Amortization of share-based compensation	60,733,000	50,550,000
Amortization of deferred loan fees	(123,305,000)	(112,383,000)
Deferred income tax benefit	(4,124,000)	(1,720,000)
Excess tax benefit from exercise of stock options and vesting of restricted shares	(3,449,000)	(7,931,000)
Losses from the write-off of premises and equipment	0	185,000
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	15,565,000	(10,429,000)
Accounts receivable and payable, net	17,534,000	(18,278,000)
Income tax receivable and payable, net	(15,267,000)	(59,527,000)
Accrued compensation	(634,000)	(109,837,000)
Foreign exchange spot contracts, net	147,021,000	34,304,000
Proceeds from termination of interest rate swaps	227,500,000	0
Other, net	(212,177,000)	(78,516,000)
Net cash provided by operating activities	1,053,291,000	709,744,000
Cash flows from investing activities:
Purchases of available-for-sale securities	(16,614,960,000)	(7,832,282,000)
Proceeds from sales of available-for-sale securities	2,654,212,000	2,189,087,000
Proceeds from maturities and paydowns of available-for-sale securities	2,634,123,000	801,605,000
Purchases of held-to-maturity securities	(1,756,920,000)	(408,479,000)
Proceeds from maturities and paydowns of held-to-maturity securities	2,833,290,000	1,516,340,000
Purchases of non-marketable and other equity securities	(163,817,000)	(100,068,000)
Proceeds from sales and distributions of capital of non-marketable and other securities	84,850,000	90,371,000
Net increase in loans	(5,193,146,000)	(2,685,151,000)
Purchases of premises and equipment	(66,003,000)	(33,871,000)
Acquisition of SVB Leerink, net of cash acquired	0	(102,328,000)
Net cash used for investing activities	(15,588,371,000)	(6,564,776,000)
Cash flows from financing activities:
Net increase in deposits	23,015,213,000	10,213,974,000
Net increase (decrease) in short-term borrowings	1,638,000	(612,514,000)
Proceeds from issuance of 3.125% Senior Notes	495,024,000	0
(Distributions to noncontrolling interests), net of contributions from noncontrolling interests	(16,363,000)	(32,002,000)
Payment of preferred stock dividend	(12,557,000)	0
Common stock repurchases	(60,020,000)	(352,511,000)
Proceeds from issuance of common stock, ESPP and ESOP, net of restricted stock awards	18,138,000	12,742,000
Net cash provided by financing activities	23,441,073,000	9,229,689,000
Net increase in cash and cash equivalents	8,905,993,000	3,374,657,000
Cash and cash equivalents at beginning of period	6,781,783,000	3,571,539,000
Cash and cash equivalents at end of period	15,687,776,000	6,946,196,000
Cash paid during the period for:
Interest	67,012,000	164,503,000
Income taxes	287,098,000	379,579,000
Noncash items during the period:
Changes in unrealized gains and losses on available-for-sale securities, net of tax	392,725,000	173,235,000
Distributions of stock from investments	11,574,000	7,770,000
Equity warrant assets
Changes in fair values of derivatives, net	(4,270,000)	12,801,000
Derivative
Changes in fair values of derivatives, net	$ (87,740,000)	$ (29,472,000)