Interim Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income before noncontrolling interests	$ 561,764,000	$ 133,649,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	18,679,000	243,480,000
Gains on investment securities, net	(167,078,000)	(46,055,000)
Distributions of earnings from non-marketable and other equity securities	21,581,000	12,346,000
Depreciation and amortization	30,949,000	24,824,000
Amortization of premiums and discounts on investment securities, net	49,161,000	13,565,000
Amortization of share-based compensation	26,691,000	19,171,000
Amortization of deferred loan fees	(52,903,000)	(33,016,000)
Deferred income tax expense (benefit)	57,513,000	(60,126,000)
Excess tax benefit from exercise of stock options and vesting of restricted shares	(10,888,000)	(2,575,000)
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(40,913,000)	23,982,000
Accounts receivable and payable, net	10,462,000	(45,311,000)
Income tax receivable and payable, net	92,515,000	66,581,000
Accrued compensation	(279,210,000)	(236,834,000)
Foreign exchange spot contracts, net	107,418,000	(12,583,000)
Proceeds from termination of interest rate swaps	0	180,500,000
Other, net	(195,907,000)	(69,013,000)
Net cash provided by operating activities	213,922,000	168,125,000
Cash flows from investing activities:
Purchases of available-for-sale securities	(450,009,000)	(1,538,553,000)
Proceeds from sales of available-for-sale securities	0	2,654,212,000
Proceeds from maturities and paydowns of available-for-sale securities	1,653,915,000	785,692,000
Purchases of held-to-maturity securities	(21,685,125,000)	(358,650,000)
Proceeds from maturities and paydowns of held-to-maturity securities	1,769,795,000	646,212,000
Purchases of non-marketable and other equity securities	(20,626,000)	(12,177,000)
Proceeds from sales and distributions of capital of non-marketable and other securities	274,435,000	45,720,000
Net increase in loans	(2,538,473,000)	(2,796,409,000)
Purchases of premises and equipment	(13,851,000)	(25,088,000)
Net cash used for investing activities	(21,009,939,000)	(599,041,000)
Cash flows from financing activities:
Net increase in deposits	22,168,299,000	154,150,000
Net increase in short-term borrowings	17,881,000	3,120,732,000
Proceeds from issuance of long-term debt	494,355,000	0
(Distributions to noncontrolling interests), net of contributions from noncontrolling interests	(12,854,000)	(328,000)
Net proceeds from the issuance of preferred stock	739,195,000	0
Payment of preferred stock dividend	(4,594,000)	(3,369,000)
Common stock repurchases	0	(60,020,000)
Proceeds from issuance of common stock, ESPP and ESOP, net of restricted stock awards	973,831,000	(584,000)
Net cash provided by financing activities	24,376,113,000	3,210,581,000
Net increase in cash and cash equivalents	3,580,096,000	2,779,665,000
Cash and cash equivalents at beginning of period	17,674,763,000	6,781,783,000
Cash and cash equivalents at end of period	21,254,859,000	9,561,448,000
Cash paid during the period for:
Interest	16,720,000	46,145,000
Income taxes	28,841,000	31,988,000
Noncash items during the period:
Changes in unrealized gains and losses on available-for-sale securities, net of tax	(594,453,000)	348,923,000
Transfers from available-for-sale securities to held-to-maturity	2,867,891,000	0
Equity warrant assets
Changes in fair values of derivatives, net	(29,445,000)	18,574,000
Derivative
Changes in fair values of derivatives, net	$ 13,533,000	$ (63,034,000)